139086939 has 8 divisors (see below), whose sum is σ = 185515792. Its totient is φ = 92691360.

The previous prime is 139086931. The next prime is 139086947. The reversal of 139086939 is 939680931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139086931) and next prime (139086947).

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

It is not a de Polignac number, because 139086939 - 2³ = 139086931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139086931) 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, 4077 + ... + 17169.

It is an arithmetic number, because the mean of its divisors is an integer number (23189474).

Almost surely, 2^139086939 is an apocalyptic number.

139086939 is a deficient number, since it is larger than the sum of its proper divisors (46428853).

139086939 is a wasteful number, since it uses less digits than its factorization.

139086939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16637.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 139086939 is about 11793.5125810761. The cubic root of 139086939 is about 518.1181225130.

The spelling of 139086939 in words is "one hundred thirty-nine million, eighty-six thousand, nine hundred thirty-nine".