13987338975 has 18 divisors (see below), whose sum is σ = 25052878656. Its totient is φ = 7459914000.

The previous prime is 13987338971. The next prime is 13987338977. The reversal of 13987338975 is 57983378931.

13987338975 is a `hidden beast` number, since 139 + 87 + 338 + 97 + 5 = 666.

It is not a de Polignac number, because 13987338975 - 2² = 13987338971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987338971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31082751 + ... + 31083200.

It is an arithmetic number, because the mean of its divisors is an integer number (1391826592).

Almost surely, 2^13987338975 is an apocalyptic number.

13987338975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13987338975 is a deficient number, since it is larger than the sum of its proper divisors (11065539681).

13987338975 is a wasteful number, since it uses less digits than its factorization.

13987338975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62165967 (or 62165959 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 13987338975 in words is "thirteen billion, nine hundred eighty-seven million, three hundred thirty-eight thousand, nine hundred seventy-five".