Properties of the Number -7439

Four Hundred Thirty-Nine

Basics

Value: -7440 → -7439 → -7438

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 43 × 173

Divisors: 1, 43, 173, 7439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: -1110100001111

Octal: -16417

Duodecimal: -437B

Hexadecimal: -1d0f

Square: 55338721

Square Root: 86.24963768039841

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) = n*(4·n+1). A7742

Sum of the quadratic residues of prime(n). A76409

Numbers n such that p(3n) is prime, where p(n) is the number of partitions of n. A111389

Sum of the quadratic nonresidues of prime(n). A125615

Numbers of the form prime(n)*(prime(n)-1)/4. A171555

The number of seconds after midnight corresponding to prime time primes, i.e., primes of the form HMMSS with primes H < 24 and MM, SS < 60, cf. A295013. A295003

T(n,k)=Number of nXk 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4. A240422

The number of seconds after midnight (3600·H + 60·MM + SS) corresponding to prime time numbers A295014, i.e., numbers of the form HMMSS with primes H < 24 and MM, SS < 60. A295004

a(n) = smallest k such that (10^k-1)/9 == 0 mod prime(n)², or 0 if no such k exists. A87094

Numbers n such that A229964(n) = 3. A229966