253709427 has 4 divisors (see below), whose sum is σ = 338279240. Its totient is φ = 169139616.

The previous prime is 253709419. The next prime is 253709441. The reversal of 253709427 is 724907352.

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

It is not a de Polignac number, because 253709427 - 2³ = 253709419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253709447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42284902 + ... + 42284907.

It is an arithmetic number, because the mean of its divisors is an integer number (84569810).

Almost surely, 2^253709427 is an apocalyptic number.

253709427 is a deficient number, since it is larger than the sum of its proper divisors (84569813).

253709427 is an equidigital number, since it uses as much as digits as its factorization.

253709427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84569812.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 253709427 is about 15928.2587560599. The cubic root of 253709427 is about 633.0609641076.

The spelling of 253709427 in words is "two hundred fifty-three million, seven hundred nine thousand, four hundred twenty-seven".