253421939 has 4 divisors (see below), whose sum is σ = 257204424. Its totient is φ = 249639456.

The previous prime is 253421929. The next prime is 253421951. The reversal of 253421939 is 939124352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 253421939 - 2¹⁶ = 253356403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253421929) 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, 1891142 + ... + 1891275.

It is an arithmetic number, because the mean of its divisors is an integer number (64301106).

Almost surely, 2^253421939 is an apocalyptic number.

253421939 is a deficient number, since it is larger than the sum of its proper divisors (3782485).

253421939 is an equidigital number, since it uses as much as digits as its factorization.

253421939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782484.

The product of its digits is 58320, while the sum is 38.

The square root of 253421939 is about 15919.2317339751. The cubic root of 253421939 is about 632.8217584164.

The spelling of 253421939 in words is "two hundred fifty-three million, four hundred twenty-one thousand, nine hundred thirty-nine".