139806976 has 27 divisors (see below), whose sum is σ = 279445971. Its totient is φ = 69808896.

The previous prime is 139806971. The next prime is 139807021. The reversal of 139806976 is 679608931.

The square root of 139806976 is 11824.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139806971) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 188815 + ... + 189553.

Almost surely, 2^139806976 is an apocalyptic number.

139806976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

139806976 is the 11824-th square number.

It is an amenable number.

139806976 is a deficient number, since it is larger than the sum of its proper divisors (139638995).

139806976 is an frugal number, since it uses more digits than its factorization.

139806976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The cubic root of 139806976 is about 519.0106632895.

Multiplying 139806976 by its sum of digits (49), we get a square (6850541824 = 82768²).

The spelling of 139806976 in words is "one hundred thirty-nine million, eight hundred six thousand, nine hundred seventy-six".