139797808 has 20 divisors (see below), whose sum is σ = 272079808. Its totient is φ = 69583680.

The previous prime is 139797799. The next prime is 139797821. The reversal of 139797808 is 808797931.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16023 + ... + 23158.

Almost surely, 2^139797808 is an apocalyptic number.

It is an amenable number.

139797808 is a deficient number, since it is larger than the sum of its proper divisors (132282000).

139797808 is a wasteful number, since it uses less digits than its factorization.

139797808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39412 (or 39406 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 139797808 is about 11823.6123075818. The cubic root of 139797808 is about 518.9993181385. Note that the first 3 decimals are identical.

The spelling of 139797808 in words is "one hundred thirty-nine million, seven hundred ninety-seven thousand, eight hundred eight".