253640507 has 2 divisors, whose sum is σ = 253640508. Its totient is φ = 253640506.

The previous prime is 253640479. The next prime is 253640579. The reversal of 253640507 is 705046352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253640507 - 2¹⁰ = 253639483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253640207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126820253 + 126820254.

It is an arithmetic number, because the mean of its divisors is an integer number (126820254).

Almost surely, 2^253640507 is an apocalyptic number.

253640507 is a deficient number, since it is larger than the sum of its proper divisors (1).

253640507 is an equidigital number, since it uses as much as digits as its factorization.

253640507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 253640507 is about 15926.0951585754. The cubic root of 253640507 is about 633.0036353838.

Adding to 253640507 its reverse (705046352), we get a palindrome (958686859).

The spelling of 253640507 in words is "two hundred fifty-three million, six hundred forty thousand, five hundred seven".