138259031 has 8 divisors (see below), whose sum is σ = 139440000. Its totient is φ = 137083320.

The previous prime is 138259021. The next prime is 138259127. The reversal of 138259031 is 130952831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138259031 is a prime.

It is a super-2 number, since 2×138259031² = 38231119306117922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138259021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64820 + ... + 66918.

It is an arithmetic number, because the mean of its divisors is an integer number (17430000).

Almost surely, 2^138259031 is an apocalyptic number.

138259031 is a deficient number, since it is larger than the sum of its proper divisors (1180969).

138259031 is a wasteful number, since it uses less digits than its factorization.

138259031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 138259031 is about 11758.3600472175. The cubic root of 138259031 is about 517.0880519764.

The spelling of 138259031 in words is "one hundred thirty-eight million, two hundred fifty-nine thousand, thirty-one".