253697 has 4 divisors (see below), whose sum is σ = 256176. Its totient is φ = 251220.

The previous prime is 253681. The next prime is 253703. The reversal of 253697 is 796352.

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 253697 - 2⁴ = 253681 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253697.

It is not an unprimeable number, because it can be changed into a prime (253607) 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, 1079 + ... + 1292.

It is an arithmetic number, because the mean of its divisors is an integer number (64044).

2²⁵³⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

253697 is a deficient number, since it is larger than the sum of its proper divisors (2479).

253697 is a wasteful number, since it uses less digits than its factorization.

253697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478.

The product of its digits is 11340, while the sum is 32.

The square root of 253697 is about 503.6834323263. The cubic root of 253697 is about 63.3050627904.

The spelling of 253697 in words is "two hundred fifty-three thousand, six hundred ninety-seven".