394297253 has 16 divisors (see below), whose sum is σ = 490704000. Its totient is φ = 309137472.

The previous prime is 394297249. The next prime is 394297261. The reversal of 394297253 is 352792493.

It is not a de Polignac number, because 394297253 - 2² = 394297249 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394297243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47258 + ... + 54971.

It is an arithmetic number, because the mean of its divisors is an integer number (30669000).

Almost surely, 2^394297253 is an apocalyptic number.

It is an amenable number.

394297253 is a deficient number, since it is larger than the sum of its proper divisors (96406747).

394297253 is a wasteful number, since it uses less digits than its factorization.

394297253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102284.

The product of its digits is 408240, while the sum is 44.

The square root of 394297253 is about 19856.9195244378. The cubic root of 394297253 is about 733.2880098481.

The spelling of 394297253 in words is "three hundred ninety-four million, two hundred ninety-seven thousand, two hundred fifty-three".