253616509 has 2 divisors, whose sum is σ = 253616510. Its totient is φ = 253616508.

The previous prime is 253616497. The next prime is 253616521. The reversal of 253616509 is 905616352.

It is a balanced prime because it is at equal distance from previous prime (253616497) and next prime (253616521).

It can be written as a sum of positive squares in only one way, i.e., 200647225 + 52969284 = 14165^2 + 7278^2 .

It is a cyclic number.

It is not a de Polignac number, because 253616509 - 2⁵ = 253616477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253616569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126808254 + 126808255.

It is an arithmetic number, because the mean of its divisors is an integer number (126808255).

Almost surely, 2^253616509 is an apocalyptic number.

It is an amenable number.

253616509 is a deficient number, since it is larger than the sum of its proper divisors (1).

253616509 is an equidigital number, since it uses as much as digits as its factorization.

253616509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 253616509 is about 15925.3417231782. The cubic root of 253616509 is about 632.9836710380.

The spelling of 253616509 in words is "two hundred fifty-three million, six hundred sixteen thousand, five hundred nine".