657317139 has 8 divisors (see below), whose sum is σ = 876543120. Its totient is φ = 438151296.

The previous prime is 657317123. The next prime is 657317147. The reversal of 657317139 is 931713756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 657317139 - 2⁴ = 657317123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 657317139.

It is not an unprimeable number, because it can be changed into a prime (657317119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28399 + ... + 46055.

It is an arithmetic number, because the mean of its divisors is an integer number (109567890).

Almost surely, 2^657317139 is an apocalyptic number.

657317139 is a deficient number, since it is larger than the sum of its proper divisors (219225981).

657317139 is a wasteful number, since it uses less digits than its factorization.

657317139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30069.

The product of its digits is 119070, while the sum is 42.

The square root of 657317139 is about 25638.1968749754. The cubic root of 657317139 is about 869.4774415100.

The spelling of 657317139 in words is "six hundred fifty-seven million, three hundred seventeen thousand, one hundred thirty-nine".