139688908 has 6 divisors (see below), whose sum is σ = 244455596. Its totient is φ = 69844452.

The previous prime is 139688891. The next prime is 139688921. The reversal of 139688908 is 809886931.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17461110 + ... + 17461117.

Almost surely, 2^139688908 is an apocalyptic number.

It is an amenable number.

139688908 is a deficient number, since it is larger than the sum of its proper divisors (104766688).

139688908 is a wasteful number, since it uses less digits than its factorization.

139688908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34922231 (or 34922229 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 139688908 is about 11819.0062187986. The cubic root of 139688908 is about 518.8645193919.

The spelling of 139688908 in words is "one hundred thirty-nine million, six hundred eighty-eight thousand, nine hundred eight".