394123113 has 12 divisors (see below), whose sum is σ = 569574148. Its totient is φ = 262617120.

The previous prime is 394123111. The next prime is 394123123. The reversal of 394123113 is 311321493.

It can be written as a sum of positive squares in 2 ways, for example, as 129345129 + 264777984 = 11373^2 + 16272^2 .

It is not a de Polignac number, because 394123113 - 2¹ = 394123111 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394123111) 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, 10131 + ... + 29847.

Almost surely, 2^394123113 is an apocalyptic number.

It is an amenable number.

394123113 is a deficient number, since it is larger than the sum of its proper divisors (175451035).

394123113 is a wasteful number, since it uses less digits than its factorization.

394123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21944 (or 21941 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 394123113 is about 19852.5341707299. The cubic root of 394123113 is about 733.1800425921.

The spelling of 394123113 in words is "three hundred ninety-four million, one hundred twenty-three thousand, one hundred thirteen".