253423909 has 4 divisors (see below), whose sum is σ = 253996416. Its totient is φ = 252851404.

The previous prime is 253423873. The next prime is 253423943. The reversal of 253423909 is 909324352.

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 253423909 - 2²⁵ = 219869477 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 (253423979) 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, 285589 + ... + 286474.

It is an arithmetic number, because the mean of its divisors is an integer number (63499104).

Almost surely, 2^253423909 is an apocalyptic number.

It is an amenable number.

253423909 is a deficient number, since it is larger than the sum of its proper divisors (572507).

253423909 is an equidigital number, since it uses as much as digits as its factorization.

253423909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572506.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 253423909 is about 15919.2936087001. The cubic root of 253423909 is about 632.8233981792.

The spelling of 253423909 in words is "two hundred fifty-three million, four hundred twenty-three thousand, nine hundred nine".