Properties of the Number -949

Nine Hundred Forty-Nine

Basics

Value: -950 → -949 → -948

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: Yes

Factorization: 13 × 73

Divisors: 1, 13, 73, 949

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: -1110110101

Octal: -1665

Duodecimal: -671

Hexadecimal: -3b5

Square: 900601

Square Root: 30.805843601498726

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

a(n) = -n² + 9·n + 23. A126719

a(n) = 2^φ(n) - ∑_j=0..n binomial(φ(n), φ(j)). A73318

Expansion of the series e(q)*e(-q) (even coefficients only), where the series e(q) is Morier-Genoud and Ovsienko's q-analog of the real number e = exp(1). A392022

Expansion of (1/x) * Series_Reversion( x / ((1-x)² * (1+x)³) ). A370107

Antidiagonal sums of triangle A098495. A98496

Start with 1 and repeatedly reverse the decimal digits and add 4 to get the next term. A117828

Flavius Josephus's sieve: Start with the natural numbers; at the k-th sieving step, remove every (k+1)-st term of the sequence remaining after the (k-1)-st sieving step; iterate. A960

Number of integer partitions of n such that it is possible to choose a different prime factor of each part. A370592

Pseudoprimes to base 3. A5935

Generalized 14-gonal numbers: m*(6·m-5), m = 0,+1,-1,+2,-2,+3,-3,... A195818