253631663 has 2 divisors, whose sum is σ = 253631664. Its totient is φ = 253631662.

The previous prime is 253631647. The next prime is 253631671. The reversal of 253631663 is 366136352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253631663 - 2⁴ = 253631647 is a prime.

It is a super-2 number, since 2×253631663² = 128658040952291138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253631683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126815831 + 126815832.

It is an arithmetic number, because the mean of its divisors is an integer number (126815832).

Almost surely, 2^253631663 is an apocalyptic number.

253631663 is a deficient number, since it is larger than the sum of its proper divisors (1).

253631663 is an equidigital number, since it uses as much as digits as its factorization.

253631663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 35.

The square root of 253631663 is about 15925.8174986404. The cubic root of 253631663 is about 632.9962780558.

The spelling of 253631663 in words is "two hundred fifty-three million, six hundred thirty-one thousand, six hundred sixty-three".