657137139 has 8 divisors (see below), whose sum is σ = 889260480. Its totient is φ = 431552616.

The previous prime is 657137119. The next prime is 657137153. The reversal of 657137139 is 931731756.

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

It is not a de Polignac number, because 657137139 - 2¹³ = 657128947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 657137139.

It is not an unprimeable number, because it can be changed into a prime (657137119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1634469 + ... + 1634870.

It is an arithmetic number, because the mean of its divisors is an integer number (111157560).

Almost surely, 2^657137139 is an apocalyptic number.

657137139 is a deficient number, since it is larger than the sum of its proper divisors (232123341).

657137139 is a wasteful number, since it uses less digits than its factorization.

657137139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269409.

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

The square root of 657137139 is about 25634.6862473485. The cubic root of 657137139 is about 869.3980682424.

The spelling of 657137139 in words is "six hundred fifty-seven million, one hundred thirty-seven thousand, one hundred thirty-nine".