138959684 has 12 divisors (see below), whose sum is σ = 243349008. Its totient is φ = 69431400.

The previous prime is 138959641. The next prime is 138959699. The reversal of 138959684 is 486959831.

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, 5222 + ... + 17469.

It is an arithmetic number, because the mean of its divisors is an integer number (20279084).

Almost surely, 2^138959684 is an apocalyptic number.

It is an amenable number.

138959684 is a deficient number, since it is larger than the sum of its proper divisors (104389324).

138959684 is a wasteful number, since it uses less digits than its factorization.

138959684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24226 (or 24224 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 138959684 is about 11788.1162193117. The cubic root of 138959684 is about 517.9600601277.

The spelling of 138959684 in words is "one hundred thirty-eight million, nine hundred fifty-nine thousand, six hundred eighty-four".