139695657 has 16 divisors (see below), whose sum is σ = 199392000. Its totient is φ = 86731344.

The previous prime is 139695653. The next prime is 139695659. The reversal of 139695657 is 756596931.

It is not a de Polignac number, because 139695657 - 2² = 139695653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139695653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17407 + ... + 24132.

It is an arithmetic number, because the mean of its divisors is an integer number (12462000).

Almost surely, 2^139695657 is an apocalyptic number.

It is an amenable number.

139695657 is a deficient number, since it is larger than the sum of its proper divisors (59696343).

139695657 is a wasteful number, since it uses less digits than its factorization.

139695657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41620.

The product of its digits is 1530900, while the sum is 51.

The square root of 139695657 is about 11819.2917300488. The cubic root of 139695657 is about 518.8728754842.

The spelling of 139695657 in words is "one hundred thirty-nine million, six hundred ninety-five thousand, six hundred fifty-seven".