253939387 has 24 divisors (see below), whose sum is σ = 292745376. Its totient is φ = 218923008.

The previous prime is 253939379. The next prime is 253939391. The reversal of 253939387 is 783939352.

It is a happy number.

It is not a de Polignac number, because 253939387 - 2³ = 253939379 is a prime.

It is a Duffinian number.

Its product of digits (1224720) is a multiple of the sum of its prime factors (567).

It is a self number, because there is not a number n which added to its sum of digits gives 253939387.

It is not an unprimeable number, because it can be changed into a prime (253939327) 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 23 ways as a sum of consecutive naturals, for example, 965418 + ... + 965680.

It is an arithmetic number, because the mean of its divisors is an integer number (12197724).

Almost surely, 2^253939387 is an apocalyptic number.

253939387 is a deficient number, since it is larger than the sum of its proper divisors (38805989).

253939387 is a wasteful number, since it uses less digits than its factorization.

253939387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 550 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 49.

The square root of 253939387 is about 15935.4757381134. The cubic root of 253939387 is about 633.2521733181.

The spelling of 253939387 in words is "two hundred fifty-three million, nine hundred thirty-nine thousand, three hundred eighty-seven".