139397608 has 32 divisors (see below), whose sum is σ = 299088000. Its totient is φ = 59666112.

The previous prime is 139397597. The next prime is 139397617. The reversal of 139397608 is 806793931.

It is a super-2 number, since 2×139397608² = 38863386232243328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85941 + ... + 87547.

It is an arithmetic number, because the mean of its divisors is an integer number (9346500).

Almost surely, 2^139397608 is an apocalyptic number.

It is an amenable number.

139397608 is an abundant number, since it is smaller than the sum of its proper divisors (159690392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139397608 is a wasteful number, since it uses less digits than its factorization.

139397608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169 (or 3165 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 139397608 is about 11806.6764163333. The cubic root of 139397608 is about 518.5035973449.

The spelling of 139397608 in words is "one hundred thirty-nine million, three hundred ninety-seven thousand, six hundred eight".