653115509 has 2 divisors, whose sum is σ = 653115510. Its totient is φ = 653115508.

The previous prime is 653115377. The next prime is 653115569. The reversal of 653115509 is 905511356.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352613284 + 300502225 = 18778^2 + 17335^2 .

It is a cyclic number.

It is not a de Polignac number, because 653115509 - 2²⁴ = 636338293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653115569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326557754 + 326557755.

It is an arithmetic number, because the mean of its divisors is an integer number (326557755).

Almost surely, 2^653115509 is an apocalyptic number.

It is an amenable number.

653115509 is a deficient number, since it is larger than the sum of its proper divisors (1).

653115509 is an equidigital number, since it uses as much as digits as its factorization.

653115509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 653115509 is about 25556.1246866578. The cubic root of 653115509 is about 867.6208875708.

The spelling of 653115509 in words is "six hundred fifty-three million, one hundred fifteen thousand, five hundred nine".