138614931 has 24 divisors (see below), whose sum is σ = 246428000. Its totient is φ = 73115136.

The previous prime is 138614921. The next prime is 138614941. The reversal of 138614931 is 139416831.

138614931 is a `hidden beast` number, since 1 + 3 + 8 + 614 + 9 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (138614921) and next prime (138614941).

It is not a de Polignac number, because 138614931 - 2⁹ = 138614419 is a prime.

It is a super-2 number, since 2×138614931² = 38428198192269522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138614911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83806 + ... + 85443.

Almost surely, 2^138614931 is an apocalyptic number.

138614931 is a deficient number, since it is larger than the sum of its proper divisors (107813069).

138614931 is a wasteful number, since it uses less digits than its factorization.

138614931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169275 (or 169272 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 138614931 is about 11773.4842336498. The cubic root of 138614931 is about 517.5313598583.

The spelling of 138614931 in words is "one hundred thirty-eight million, six hundred fourteen thousand, nine hundred thirty-one".