253653857 has 4 divisors (see below), whose sum is σ = 267004080. Its totient is φ = 240303636.

The previous prime is 253653847. The next prime is 253653863. The reversal of 253653857 is 758356352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253653857 - 2⁶ = 253653793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253653847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6675083 + ... + 6675120.

It is an arithmetic number, because the mean of its divisors is an integer number (66751020).

Almost surely, 2^253653857 is an apocalyptic number.

It is an amenable number.

253653857 is a deficient number, since it is larger than the sum of its proper divisors (13350223).

253653857 is a wasteful number, since it uses less digits than its factorization.

253653857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13350222.

The product of its digits is 756000, while the sum is 44.

The square root of 253653857 is about 15926.5142765139. The cubic root of 253653857 is about 633.0147409315.

The spelling of 253653857 in words is "two hundred fifty-three million, six hundred fifty-three thousand, eight hundred fifty-seven".