13953931 has 2 divisors, whose sum is σ = 13953932. Its totient is φ = 13953930.

The previous prime is 13953869. The next prime is 13953997. The reversal of 13953931 is 13935931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13953931 - 2⁷ = 13953803 is a prime.

It is a super-2 number, since 2×13953931² = 389424380705522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13953631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6976965 + 6976966.

It is an arithmetic number, because the mean of its divisors is an integer number (6976966).

Almost surely, 2^13953931 is an apocalyptic number.

13953931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13953931 is an equidigital number, since it uses as much as digits as its factorization.

13953931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10935, while the sum is 34.

The square root of 13953931 is about 3735.4960848594. The cubic root of 13953931 is about 240.7495719963.

It can be divided in two parts, 13953 and 931, that added together give a square (14884 = 122²).

The spelling of 13953931 in words is "thirteen million, nine hundred fifty-three thousand, nine hundred thirty-one".