394103231 has 6 divisors (see below), whose sum is σ = 418649760. Its totient is φ = 370920416.

The previous prime is 394103219. The next prime is 394103233. The reversal of 394103231 is 132301493.

It is a happy number.

It is not a de Polignac number, because 394103231 - 2²² = 389908927 is a prime.

It is a super-2 number, since 2×394103231² = 310634713369278722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394103231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394103233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 681551 + ... + 682128.

It is an arithmetic number, because the mean of its divisors is an integer number (69774960).

Almost surely, 2^394103231 is an apocalyptic number.

394103231 is a deficient number, since it is larger than the sum of its proper divisors (24546529).

394103231 is a wasteful number, since it uses less digits than its factorization.

394103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363713 (or 1363696 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 394103231 is about 19852.0334222971. The cubic root of 394103231 is about 733.1677136774.

The spelling of 394103231 in words is "three hundred ninety-four million, one hundred three thousand, two hundred thirty-one".