657163139 has 4 divisors (see below), whose sum is σ = 662978856. Its totient is φ = 651347424.

The previous prime is 657163123. The next prime is 657163183. The reversal of 657163139 is 931361756.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 657163139 - 2⁴ = 657163123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657163096 and 657163105.

It is not an unprimeable number, because it can be changed into a prime (657168139) 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, 2907689 + ... + 2907914.

It is an arithmetic number, because the mean of its divisors is an integer number (165744714).

Almost surely, 2^657163139 is an apocalyptic number.

657163139 is a deficient number, since it is larger than the sum of its proper divisors (5815717).

657163139 is a wasteful number, since it uses less digits than its factorization.

657163139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815716.

The product of its digits is 102060, while the sum is 41.

The square root of 657163139 is about 25635.1933677123. The cubic root of 657163139 is about 869.4095341655.

The spelling of 657163139 in words is "six hundred fifty-seven million, one hundred sixty-three thousand, one hundred thirty-nine".