253457863 has 2 divisors, whose sum is σ = 253457864. Its totient is φ = 253457862.

The previous prime is 253457821. The next prime is 253457873. The reversal of 253457863 is 368754352.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253457863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253457803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126728931 + 126728932.

It is an arithmetic number, because the mean of its divisors is an integer number (126728932).

Almost surely, 2^253457863 is an apocalyptic number.

253457863 is a deficient number, since it is larger than the sum of its proper divisors (1).

253457863 is an equidigital number, since it uses as much as digits as its factorization.

253457863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 43.

The square root of 253457863 is about 15920.3600147735. The cubic root of 253457863 is about 632.8516590304.

The spelling of 253457863 in words is "two hundred fifty-three million, four hundred fifty-seven thousand, eight hundred sixty-three".