253791394 has 16 divisors (see below), whose sum is σ = 391749120. Its totient is φ = 123236640.

The previous prime is 253791367. The next prime is 253791427. The reversal of 253791394 is 493197352.

It is a self number, because there is not a number n which added to its sum of digits gives 253791394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11347 + ... + 25225.

It is an arithmetic number, because the mean of its divisors is an integer number (24484320).

Almost surely, 2^253791394 is an apocalyptic number.

253791394 is a deficient number, since it is larger than the sum of its proper divisors (137957726).

253791394 is a wasteful number, since it uses less digits than its factorization.

253791394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14145.

The product of its digits is 204120, while the sum is 43.

The square root of 253791394 is about 15930.8315539397. The cubic root of 253791394 is about 633.1291320133.

The spelling of 253791394 in words is "two hundred fifty-three million, seven hundred ninety-one thousand, three hundred ninety-four".