653257823 has 4 divisors (see below), whose sum is σ = 674330688. Its totient is φ = 632184960.

The previous prime is 653257811. The next prime is 653257877. The reversal of 653257823 is 328752356.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653257823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653257123) 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, 10536386 + ... + 10536447.

It is an arithmetic number, because the mean of its divisors is an integer number (168582672).

Almost surely, 2^653257823 is an apocalyptic number.

653257823 is a deficient number, since it is larger than the sum of its proper divisors (21072865).

653257823 is a wasteful number, since it uses less digits than its factorization.

653257823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21072864.

The product of its digits is 302400, while the sum is 41.

The square root of 653257823 is about 25558.9088773367. The cubic root of 653257823 is about 867.6839012491.

The spelling of 653257823 in words is "six hundred fifty-three million, two hundred fifty-seven thousand, eight hundred twenty-three".