397189633 has 2 divisors, whose sum is σ = 397189634. Its totient is φ = 397189632.

The previous prime is 397189609. The next prime is 397189687. The reversal of 397189633 is 336981793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310922689 + 86266944 = 17633^2 + 9288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397189633 is a prime.

It is not a weakly prime, because it can be changed into another prime (397187633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198594816 + 198594817.

It is an arithmetic number, because the mean of its divisors is an integer number (198594817).

Almost surely, 2^397189633 is an apocalyptic number.

It is an amenable number.

397189633 is a deficient number, since it is larger than the sum of its proper divisors (1).

397189633 is an equidigital number, since it uses as much as digits as its factorization.

397189633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 49.

The square root of 397189633 is about 19929.6169807651. The cubic root of 397189633 is about 735.0766625267.

The spelling of 397189633 in words is "three hundred ninety-seven million, one hundred eighty-nine thousand, six hundred thirty-three".