253704157 has 4 divisors (see below), whose sum is σ = 289947616. Its totient is φ = 217460700.

The previous prime is 253704133. The next prime is 253704161. The reversal of 253704157 is 751407352.

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 253704157 - 2⁷ = 253704029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253704197) 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, 18121719 + ... + 18121732.

It is an arithmetic number, because the mean of its divisors is an integer number (72486904).

Almost surely, 2^253704157 is an apocalyptic number.

It is an amenable number.

253704157 is a deficient number, since it is larger than the sum of its proper divisors (36243459).

253704157 is an equidigital number, since it uses as much as digits as its factorization.

253704157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36243458.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 253704157 is about 15928.0933259446. The cubic root of 253704157 is about 633.0565808065.

The spelling of 253704157 in words is "two hundred fifty-three million, seven hundred four thousand, one hundred fifty-seven".