139664590 has 16 divisors (see below), whose sum is σ = 270734688. Its totient is φ = 51568416.

The previous prime is 139664557. The next prime is 139664617. The reversal of 139664590 is 95466931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537042 + ... + 537301.

It is an arithmetic number, because the mean of its divisors is an integer number (16920918).

Almost surely, 2^139664590 is an apocalyptic number.

139664590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139664590 is a deficient number, since it is larger than the sum of its proper divisors (131070098).

139664590 is a wasteful number, since it uses less digits than its factorization.

139664590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074363.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 139664590 is about 11817.9774073231. The cubic root of 139664590 is about 518.8344084837.

The spelling of 139664590 in words is "one hundred thirty-nine million, six hundred sixty-four thousand, five hundred ninety".