253135479 has 4 divisors (see below), whose sum is σ = 337513976. Its totient is φ = 168756984.

The previous prime is 253135471. The next prime is 253135483. The reversal of 253135479 is 974531352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 253135479 - 2³ = 253135471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253135471) 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, 42189244 + ... + 42189249.

It is an arithmetic number, because the mean of its divisors is an integer number (84378494).

Almost surely, 2^253135479 is an apocalyptic number.

253135479 is a deficient number, since it is larger than the sum of its proper divisors (84378497).

253135479 is an equidigital number, since it uses as much as digits as its factorization.

253135479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84378496.

The product of its digits is 113400, while the sum is 39.

The square root of 253135479 is about 15910.2318964872. The cubic root of 253135479 is about 632.5832280716.

The spelling of 253135479 in words is "two hundred fifty-three million, one hundred thirty-five thousand, four hundred seventy-nine".