139899688 has 16 divisors (see below), whose sum is σ = 264051360. Its totient is φ = 69486000.

The previous prime is 139899673. The next prime is 139899689. The reversal of 139899688 is 886998931.

It is not an unprimeable number, because it can be changed into a prime (139899689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56698 + ... + 59113.

It is an arithmetic number, because the mean of its divisors is an integer number (16503210).

Almost surely, 2^139899688 is an apocalyptic number.

It is an amenable number.

139899688 is a deficient number, since it is larger than the sum of its proper divisors (124151672).

139899688 is a wasteful number, since it uses less digits than its factorization.

139899688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115968 (or 115964 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 61.

The square root of 139899688 is about 11827.9198509290. The cubic root of 139899688 is about 519.1253640134.

The spelling of 139899688 in words is "one hundred thirty-nine million, eight hundred ninety-nine thousand, six hundred eighty-eight".