Properties of the Number 7948

Seven Thousand Nine Hundred Forty-Eight

Basics

Value: 7947 → 7948 → 7949

Parity: even

Prime: No

Previous Prime: 7937

Next Prime: 7949

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 1987

Divisors: 1, 2, 4, 1987, 3974, 7948

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111100001100

Octal: 17414

Duodecimal: 4724

Hexadecimal: 1f0c

Square: 63170704

Square Root: 89.15155635209068

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

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically. A253510

Number of partitions of n such that the number of parts having multiplicity >1 is a part and the number of distinct parts is a part. A241409

a(n) = sum of the first n upper twin primes. A86168

A Diaconis-Mosteller approximation to the Birthday problem function. A50255

G.f. satisfies: A(x) = exp( ∑_n>=1 xⁿ/n * ∏_d∣n A(d·x^d)ⁿ ). A205501

G.f. A(x) satisfies: x = ∑_n>=1 1/A(x)ⁿ * ∏_k=1..n (1 - 1/A(x)^2·k-1). A247481

Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, among all distinct circles that can be constructed from the 4 vertices and the equally spaced 4·n points placed on the sides of a square when every pair of the 4 + 4·n points are connected by a circle and where the points lie at the ends of the circle's diameter. A373109

Base-9 palindromes that start with 1. A43028

a(n) = A080313(n)/2. A80315

Indices of even terms in A249064. A249557