653131657 has 4 divisors (see below), whose sum is σ = 662078740. Its totient is φ = 644184576.

The previous prime is 653131613. The next prime is 653131729. The reversal of 653131657 is 756131356.

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

It can be written as a sum of positive squares in 2 ways, for example, as 346741641 + 306390016 = 18621^2 + 17504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653131657 is a prime.

It is a super-2 number, since 2×653131657² = 853161922751131298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653131757) 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, 4473432 + ... + 4473577.

It is an arithmetic number, because the mean of its divisors is an integer number (165519685).

Almost surely, 2^653131657 is an apocalyptic number.

It is an amenable number.

653131657 is a deficient number, since it is larger than the sum of its proper divisors (8947083).

653131657 is an equidigital number, since it uses as much as digits as its factorization.

653131657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8947082.

The product of its digits is 56700, while the sum is 37.

The square root of 653131657 is about 25556.4406167995. The cubic root of 653131657 is about 867.6280380296.

The spelling of 653131657 in words is "six hundred fifty-three million, one hundred thirty-one thousand, six hundred fifty-seven".