Properties of the Number 48991

Forty-Eight Thousand Nine Hundred Ninety-One

Basics

Value: 48990 → 48991 → 48992

Parity: odd

Prime: Yes

Previous Prime: 48989

Next Prime: 49003

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 48991

Divisors: 1, 48991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1011111101011111

Octal: 137537

Duodecimal: 24427

Hexadecimal: bf5f

Square: 2400118081

Square Root: 221.33910635041428

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Right-truncatable, reversible primes in base 16. A238851

Minimal natural number (in decimal representation) with n prime substrings in base-4 representation (substrings with leading zeros are considered to be nonprime). A217304

Number of arrays of 4 integers in -n..n with sum zero and equal numbers of elements greater than zero and less than zero. A201812

Primes of the form 10n² - 9. A201964

Greatest number (in decimal representation) with n nonprime substrings in base-4 representation (substrings with leading zeros are considered to be nonprime). A217114

Numbers n such that φ(reversal(n)) = reversal(φ(n)). Ignore leading 0's. A69282

Primes that are exactly between the nearest square and the nearest triangular number. A233443

Write down the numbers 1,2,3,... but omit any number (such as 12 or 23 or 31 ...) which appears in the concatenation of all earlier terms. A48991

Number of nX4 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. A280957