399936233 has 2 divisors, whose sum is σ = 399936234. Its totient is φ = 399936232.

The previous prime is 399936227. The next prime is 399936253. The reversal of 399936233 is 332639993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312476329 + 87459904 = 17677^2 + 9352^2 .

It is a cyclic number.

It is not a de Polignac number, because 399936233 - 2⁴ = 399936217 is a prime.

It is not a weakly prime, because it can be changed into another prime (399936223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199968116 + 199968117.

It is an arithmetic number, because the mean of its divisors is an integer number (199968117).

Almost surely, 2^399936233 is an apocalyptic number.

It is an amenable number.

399936233 is a deficient number, since it is larger than the sum of its proper divisors (1).

399936233 is an equidigital number, since it uses as much as digits as its factorization.

399936233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 708588, while the sum is 47.

The square root of 399936233 is about 19998.4057614601. The cubic root of 399936233 is about 736.7671443746.

The spelling of 399936233 in words is "three hundred ninety-nine million, nine hundred thirty-six thousand, two hundred thirty-three".