397982201 has 2 divisors, whose sum is σ = 397982202. Its totient is φ = 397982200.

The previous prime is 397982197. The next prime is 397982231. The reversal of 397982201 is 102289793.

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., 397962601 + 19600 = 19949^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 397982201 - 2² = 397982197 is a prime.

It is not a weakly prime, because it can be changed into another prime (397982231) 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, 198991100 + 198991101.

It is an arithmetic number, because the mean of its divisors is an integer number (198991101).

Almost surely, 2^397982201 is an apocalyptic number.

It is an amenable number.

397982201 is a deficient number, since it is larger than the sum of its proper divisors (1).

397982201 is an equidigital number, since it uses as much as digits as its factorization.

397982201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 397982201 is about 19949.4912466459. The cubic root of 397982201 is about 735.5652714158.

The spelling of 397982201 in words is "three hundred ninety-seven million, nine hundred eighty-two thousand, two hundred one".