13992731 has 2 divisors, whose sum is σ = 13992732. Its totient is φ = 13992730.

The previous prime is 13992637. The next prime is 13992757. The reversal of 13992731 is 13729931.

13992731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13992731 is a prime.

It is a super-2 number, since 2×13992731² = 391593041676722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13992691 and 13992700.

It is not a weakly prime, because it can be changed into another prime (13992791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6996365 + 6996366.

It is an arithmetic number, because the mean of its divisors is an integer number (6996366).

Almost surely, 2^13992731 is an apocalyptic number.

13992731 is a deficient number, since it is larger than the sum of its proper divisors (1).

13992731 is an equidigital number, since it uses as much as digits as its factorization.

13992731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 13992731 is about 3740.6858996713. The cubic root of 13992731 is about 240.9725065197.

The spelling of 13992731 in words is "thirteen million, nine hundred ninety-two thousand, seven hundred thirty-one".