139000931 has 4 divisors (see below), whose sum is σ = 143484864. Its totient is φ = 134517000.

The previous prime is 139000919. The next prime is 139000933.

139000931 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139000931 - 2⁶ = 139000867 is a prime.

It is a super-2 number, since 2×139000931² = 38642517637733522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139000931.

It is not an unprimeable number, because it can be changed into a prime (139000933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241920 + ... + 2241981.

It is an arithmetic number, because the mean of its divisors is an integer number (35871216).

Almost surely, 2^139000931 is an apocalyptic number.

139000931 is a deficient number, since it is larger than the sum of its proper divisors (4483933).

139000931 is an equidigital number, since it uses as much as digits as its factorization.

139000931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483932.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 139000931 is about 11789.8656056802. The cubic root of 139000931 is about 518.0113032521.

It can be divided in two parts, 139000 and 931, that added together give a palindrome (139931).

The spelling of 139000931 in words is "one hundred thirty-nine million, nine hundred thirty-one", and thus it is an aban number.