Properties of the Number 1379

One Thousand Three Hundred Seventy-Nine

Basics

Value: 1378 → 1379 → 1380

Parity: odd

Prime: No

Previous Prime: 1373

Next Prime: 1381

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 197

Divisors: 1, 7, 197, 1379

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101100011

Octal: 2543

Duodecimal: 96B

Hexadecimal: 563

Square: 1901641

Square Root: 37.134889255254286

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

Toothpick sequence (see Comments lines for definition). A139250

Central polygonal numbers (the Lazy Caterer's sequence): n(n+1)/2 + 1; or, maximal number of pieces formed when slicing a pancake with n cuts. A124

a(n) = n*(n² + 1)/2. A6003

List of codewords in binary lexicode with Hamming distance 4 written as decimal numbers. A75928

Numbers > 1000 such that all the substrings of length = 3 are primes (substrings with leading '0' are considered to be nonprime). A211684

Number of anti-transitive rooted trees with n nodes. A306844

a(n) = 1 + n + 2·n². A84849

Multiples of 7 containing a 7 in their decimal representation. A121027

a(n) = 1 + (n-2)*(n-1)/2. A152947

a(n) = ∑_k=1..n lcm(n,k)/n. A57661