653020657 has 4 divisors (see below), whose sum is σ = 653379136. Its totient is φ = 652662180.

The previous prime is 653020607. The next prime is 653020691. The reversal of 653020657 is 756020356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 653020657 - 2²⁷ = 518802929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653020607) 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 3 ways as a sum of consecutive naturals, for example, 176493 + ... + 180154.

It is an arithmetic number, because the mean of its divisors is an integer number (163344784).

Almost surely, 2^653020657 is an apocalyptic number.

It is an amenable number.

653020657 is a deficient number, since it is larger than the sum of its proper divisors (358479).

653020657 is a wasteful number, since it uses less digits than its factorization.

653020657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358478.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 653020657 is about 25554.2688606033. The cubic root of 653020657 is about 867.5788839948.

The spelling of 653020657 in words is "six hundred fifty-three million, twenty thousand, six hundred fifty-seven".