13423087931 has 6 divisors (see below), whose sum is σ = 14754303396. Its totient is φ = 12202807100.

The previous prime is 13423087913. The next prime is 13423087973. The reversal of 13423087931 is 13978032431.

It is a de Polignac number, because none of the positive numbers 2^k-13423087931 is a prime.

It is a super-2 number, since 2×13423087931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13423087231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55467185 + ... + 55467426.

It is an arithmetic number, because the mean of its divisors is an integer number (2459050566).

Almost surely, 2^13423087931 is an apocalyptic number.

13423087931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13423087931 is a deficient number, since it is larger than the sum of its proper divisors (1331215465).

13423087931 is a wasteful number, since it uses less digits than its factorization.

13423087931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110934633 (or 110934622 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 13423087931 in words is "thirteen billion, four hundred twenty-three million, eighty-seven thousand, nine hundred thirty-one".