139687216 has 40 divisors (see below), whose sum is σ = 275607360. Its totient is φ = 68576064.

The previous prime is 139687213. The next prime is 139687291. The reversal of 139687216 is 612786931.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (139687213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237675 + ... + 238261.

It is an arithmetic number, because the mean of its divisors is an integer number (6890184).

Almost surely, 2^139687216 is an apocalyptic number.

139687216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139687216 is a deficient number, since it is larger than the sum of its proper divisors (135920144).

139687216 is a wasteful number, since it uses less digits than its factorization.

139687216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841 (or 835 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 139687216 is about 11818.9346389596. The cubic root of 139687216 is about 518.8624244455.

The spelling of 139687216 in words is "one hundred thirty-nine million, six hundred eighty-seven thousand, two hundred sixteen".