253690479 has 24 divisors (see below), whose sum is σ = 419807232. Its totient is φ = 144614160.

The previous prime is 253690477. The next prime is 253690511. The reversal of 253690479 is 974096352.

It is a happy number.

It is not a de Polignac number, because 253690479 - 2¹ = 253690477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253690477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22482 + ... + 31824.

It is an arithmetic number, because the mean of its divisors is an integer number (17491968).

Almost surely, 2^253690479 is an apocalyptic number.

253690479 is a deficient number, since it is larger than the sum of its proper divisors (166116753).

253690479 is a wasteful number, since it uses less digits than its factorization.

253690479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787 (or 9784 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 253690479 is about 15927.6639530096. The cubic root of 253690479 is about 633.0452039025.

The spelling of 253690479 in words is "two hundred fifty-three million, six hundred ninety thousand, four hundred seventy-nine".