13939493931 has 96 divisors (see below), whose sum is σ = 23319609600. Its totient is φ = 8160238080.

The previous prime is 13939493929. The next prime is 13939493933.

13939493931 is a `hidden beast` number, since 1 + 39 + 39 + 493 + 93 + 1 = 666.

13939493931 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (13939493929) and next prime (13939493933).

It is not a de Polignac number, because 13939493931 - 2¹ = 13939493929 is a prime.

It is a super-2 number, since 2×13939493931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13939493933) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100284060 + ... + 100284198.

It is an arithmetic number, because the mean of its divisors is an integer number (242912600).

Almost surely, 2^13939493931 is an apocalyptic number.

13939493931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13939493931 is a deficient number, since it is larger than the sum of its proper divisors (9380115669).

13939493931 is a wasteful number, since it uses less digits than its factorization.

13939493931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 309 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 54.

The spelling of 13939493931 in words is "thirteen billion, nine hundred thirty-nine million, four hundred ninety-three thousand, nine hundred thirty-one".