253921839 has 4 divisors (see below), whose sum is σ = 338562456. Its totient is φ = 169281224.

The previous prime is 253921819. The next prime is 253921873. The reversal of 253921839 is 938129352.

253921839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 253921839 - 2⁸ = 253921583 is a prime.

It is a super-2 number, since 2×253921839² = 128952600642283842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253921839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253921819) 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, 42320304 + ... + 42320309.

It is an arithmetic number, because the mean of its divisors is an integer number (84640614).

Almost surely, 2^253921839 is an apocalyptic number.

253921839 is a deficient number, since it is larger than the sum of its proper divisors (84640617).

253921839 is an equidigital number, since it uses as much as digits as its factorization.

253921839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84640616.

The product of its digits is 116640, while the sum is 42.

The square root of 253921839 is about 15934.9251331784. The cubic root of 253921839 is about 633.2375864184.

The spelling of 253921839 in words is "two hundred fifty-three million, nine hundred twenty-one thousand, eight hundred thirty-nine".