396921233 has 2 divisors, whose sum is σ = 396921234. Its totient is φ = 396921232.

The previous prime is 396921227. The next prime is 396921257. The reversal of 396921233 is 332129693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381928849 + 14992384 = 19543^2 + 3872^2 .

It is a cyclic number.

It is not a de Polignac number, because 396921233 - 2⁸ = 396920977 is a prime.

It is not a weakly prime, because it can be changed into another prime (396924233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198460616 + 198460617.

It is an arithmetic number, because the mean of its divisors is an integer number (198460617).

Almost surely, 2^396921233 is an apocalyptic number.

It is an amenable number.

396921233 is a deficient number, since it is larger than the sum of its proper divisors (1).

396921233 is an equidigital number, since it uses as much as digits as its factorization.

396921233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 38.

The square root of 396921233 is about 19922.8821459145. The cubic root of 396921233 is about 734.9110497505.

The spelling of 396921233 in words is "three hundred ninety-six million, nine hundred twenty-one thousand, two hundred thirty-three".