Properties of the Number 7813

Seven Thousand Eight Hundred Thirteen

Basics

Value: 7812 → 7813 → 7814

Parity: odd

Prime: No

Previous Prime: 7793

Next Prime: 7817

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 13 × 601

Divisors: 1, 13, 601, 7813

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111010000101

Octal: 17205

Duodecimal: 4631

Hexadecimal: 1e85

Square: 61042969

Square Root: 88.3911760301898

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

Multiples of 13 containing a 13 in their decimal representation. A121033

Number of integer partitions of n with more than one part of least multiplicity. A362609

Number of unlabeled rooted trees with at most n nodes. A87803

Pseudoprimes to base 5. A5936

Strong pseudoprimes to base 5. A20231

Permutation of natural numbers, the even bisection of A241909 incremented by one and halved; equally, a composition of A241909 and A048673: a(n) = A048673(A241909(n)). A243066

Convolution triangle of A000129(n) (Pell numbers). A54456

Self-convolution of Pell numbers (A000129). A6645

a(n) = (5ⁿ + 1)/2. A34478

Euler pseudoprimes to base 5: composite integers such that abs(5^{(n - 1}/2)) == 1 mod n. A262052