253938393 has 12 divisors (see below), whose sum is σ = 367169088. Its totient is φ = 169121880.

The previous prime is 253938323. The next prime is 253938397. The reversal of 253938393 is 393839352.

It is a happy number.

253938393 is a `hidden beast` number, since 253 + 9 + 3 + 8 + 393 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-253938393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253938397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4405 + ... + 22962.

It is an arithmetic number, because the mean of its divisors is an integer number (30597424).

Almost surely, 2^253938393 is an apocalyptic number.

It is an amenable number.

253938393 is a deficient number, since it is larger than the sum of its proper divisors (113230695).

253938393 is a wasteful number, since it uses less digits than its factorization.

253938393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28404 (or 28401 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 253938393 is about 15935.4445498078. Note that the first 3 decimals coincide. The cubic root of 253938393 is about 633.2513470665.

The spelling of 253938393 in words is "two hundred fifty-three million, nine hundred thirty-eight thousand, three hundred ninety-three".