253929817 has 2 divisors, whose sum is σ = 253929818. Its totient is φ = 253929816.

The previous prime is 253929757. The next prime is 253929827. The reversal of 253929817 is 718929352.

253929817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244953801 + 8976016 = 15651^2 + 2996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253929817 is a prime.

It is not a weakly prime, because it can be changed into another prime (253929827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126964908 + 126964909.

It is an arithmetic number, because the mean of its divisors is an integer number (126964909).

Almost surely, 2^253929817 is an apocalyptic number.

It is an amenable number.

253929817 is a deficient number, since it is larger than the sum of its proper divisors (1).

253929817 is an equidigital number, since it uses as much as digits as its factorization.

253929817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 253929817 is about 15935.1754618517. The cubic root of 253929817 is about 633.2442182709.

The spelling of 253929817 in words is "two hundred fifty-three million, nine hundred twenty-nine thousand, eight hundred seventeen".