394392233 has 2 divisors, whose sum is σ = 394392234. Its totient is φ = 394392232.

The previous prime is 394392223. The next prime is 394392269. The reversal of 394392233 is 332293493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302481664 + 91910569 = 17392^2 + 9587^2 .

It is a cyclic number.

It is not a de Polignac number, because 394392233 - 2¹⁰ = 394391209 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (394392223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197196116 + 197196117.

It is an arithmetic number, because the mean of its divisors is an integer number (197196117).

Almost surely, 2^394392233 is an apocalyptic number.

It is an amenable number.

394392233 is a deficient number, since it is larger than the sum of its proper divisors (1).

394392233 is an equidigital number, since it uses as much as digits as its factorization.

394392233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 38.

The square root of 394392233 is about 19859.3109900621. The cubic root of 394392233 is about 733.3468842996.

The spelling of 394392233 in words is "three hundred ninety-four million, three hundred ninety-two thousand, two hundred thirty-three".