397651433 has 2 divisors, whose sum is σ = 397651434. Its totient is φ = 397651432.

The previous prime is 397651427. The next prime is 397651481. The reversal of 397651433 is 334156793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352988944 + 44662489 = 18788^2 + 6683^2 .

It is a cyclic number.

It is not a de Polignac number, because 397651433 - 2²⁴ = 380874217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397656433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198825716 + 198825717.

It is an arithmetic number, because the mean of its divisors is an integer number (198825717).

Almost surely, 2^397651433 is an apocalyptic number.

It is an amenable number.

397651433 is a deficient number, since it is larger than the sum of its proper divisors (1).

397651433 is an equidigital number, since it uses as much as digits as its factorization.

397651433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 41.

The square root of 397651433 is about 19941.1993871984. The cubic root of 397651433 is about 735.3614357603.

The spelling of 397651433 in words is "three hundred ninety-seven million, six hundred fifty-one thousand, four hundred thirty-three".