253633493 has 2 divisors, whose sum is σ = 253633494. Its totient is φ = 253633492.

The previous prime is 253633487. The next prime is 253633511. The reversal of 253633493 is 394336352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241087729 + 12545764 = 15527^2 + 3542^2 .

It is a cyclic number.

It is not a de Polignac number, because 253633493 - 2⁴ = 253633477 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253633403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126816746 + 126816747.

It is an arithmetic number, because the mean of its divisors is an integer number (126816747).

Almost surely, 2^253633493 is an apocalyptic number.

It is an amenable number.

253633493 is a deficient number, since it is larger than the sum of its proper divisors (1).

253633493 is an equidigital number, since it uses as much as digits as its factorization.

253633493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 38.

The square root of 253633493 is about 15925.8749524163. The cubic root of 253633493 is about 632.9978004477.

The spelling of 253633493 in words is "two hundred fifty-three million, six hundred thirty-three thousand, four hundred ninety-three".