139671915 has 32 divisors (see below), whose sum is σ = 238878720. Its totient is φ = 69441024.

The previous prime is 139671901. The next prime is 139671937. The reversal of 139671915 is 519176931.

139671915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139671915 - 2⁸ = 139671659 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24726 + ... + 29844.

It is an arithmetic number, because the mean of its divisors is an integer number (7464960).

Almost surely, 2^139671915 is an apocalyptic number.

139671915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139671915 is a deficient number, since it is larger than the sum of its proper divisors (99206805).

139671915 is a wasteful number, since it uses less digits than its factorization.

139671915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251.

The product of its digits is 51030, while the sum is 42.

The square root of 139671915 is about 11818.2873124662. The cubic root of 139671915 is about 518.8434787751.

The spelling of 139671915 in words is "one hundred thirty-nine million, six hundred seventy-one thousand, nine hundred fifteen".