253620817 has 2 divisors, whose sum is σ = 253620818. Its totient is φ = 253620816.

The previous prime is 253620791. The next prime is 253620853. The reversal of 253620817 is 718026352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139216401 + 114404416 = 11799^2 + 10696^2 .

It is a cyclic number.

It is not a de Polignac number, because 253620817 - 2²³ = 245232209 is a prime.

It is not a weakly prime, because it can be changed into another prime (253620617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126810408 + 126810409.

It is an arithmetic number, because the mean of its divisors is an integer number (126810409).

Almost surely, 2^253620817 is an apocalyptic number.

It is an amenable number.

253620817 is a deficient number, since it is larger than the sum of its proper divisors (1).

253620817 is an equidigital number, since it uses as much as digits as its factorization.

253620817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 253620817 is about 15925.4769787281. The cubic root of 253620817 is about 632.9872550295.

The spelling of 253620817 in words is "two hundred fifty-three million, six hundred twenty thousand, eight hundred seventeen".