656434253 has 2 divisors, whose sum is σ = 656434254. Its totient is φ = 656434252.

The previous prime is 656434223. The next prime is 656434291. The reversal of 656434253 is 352434656.

It is a happy number.

It is an a-pointer prime, because the next prime (656434291) can be obtained adding 656434253 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359974729 + 296459524 = 18973^2 + 17218^2 .

It is a cyclic number.

It is not a de Polignac number, because 656434253 - 2⁶ = 656434189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656434223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328217126 + 328217127.

It is an arithmetic number, because the mean of its divisors is an integer number (328217127).

Almost surely, 2^656434253 is an apocalyptic number.

It is an amenable number.

656434253 is a deficient number, since it is larger than the sum of its proper divisors (1).

656434253 is an equidigital number, since it uses as much as digits as its factorization.

656434253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 38.

The square root of 656434253 is about 25620.9729128306. The cubic root of 656434253 is about 869.0879829240.

It can be divided in two parts, 65643 and 4253, that added together give a palindrome (69896).

The spelling of 656434253 in words is "six hundred fifty-six million, four hundred thirty-four thousand, two hundred fifty-three".