253863917 has 2 divisors, whose sum is σ = 253863918. Its totient is φ = 253863916.

The previous prime is 253863887. The next prime is 253863989. The reversal of 253863917 is 719368352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185123236 + 68740681 = 13606^2 + 8291^2 .

It is a cyclic number.

It is not a de Polignac number, because 253863917 - 2¹⁸ = 253601773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253863817) 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, 126931958 + 126931959.

It is an arithmetic number, because the mean of its divisors is an integer number (126931959).

Almost surely, 2^253863917 is an apocalyptic number.

It is an amenable number.

253863917 is a deficient number, since it is larger than the sum of its proper divisors (1).

253863917 is an equidigital number, since it uses as much as digits as its factorization.

253863917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 253863917 is about 15933.1075751091. The cubic root of 253863917 is about 633.1894335735.

The spelling of 253863917 in words is "two hundred fifty-three million, eight hundred sixty-three thousand, nine hundred seventeen".