139694656 has 28 divisors (see below), whose sum is σ = 277606252. Its totient is φ = 69746688.

The previous prime is 139694651. The next prime is 139694657. The reversal of 139694656 is 656496931.

It can be written as a sum of positive squares in 2 ways, for example, as 58982400 + 80712256 = 7680^2 + 8984^2 .

It is not an unprimeable number, because it can be changed into a prime (139694651) 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, 65056 + ... + 67168.

It is an arithmetic number, because the mean of its divisors is an integer number (9914509).

Almost surely, 2^139694656 is an apocalyptic number.

139694656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

139694656 is a deficient number, since it is larger than the sum of its proper divisors (137911596).

139694656 is a wasteful number, since it uses less digits than its factorization.

139694656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158 (or 3148 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 139694656 is about 11819.2493839499. The cubic root of 139694656 is about 518.8716361401.

The spelling of 139694656 in words is "one hundred thirty-nine million, six hundred ninety-four thousand, six hundred fifty-six".