397385843 has 2 divisors, whose sum is σ = 397385844. Its totient is φ = 397385842.

The previous prime is 397385797. The next prime is 397385851. The reversal of 397385843 is 348583793.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397385843 - 2²⁸ = 128950387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397385791 and 397385800.

It is not a weakly prime, because it can be changed into another prime (397315843) 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, 198692921 + 198692922.

It is an arithmetic number, because the mean of its divisors is an integer number (198692922).

Almost surely, 2^397385843 is an apocalyptic number.

397385843 is a deficient number, since it is larger than the sum of its proper divisors (1).

397385843 is an equidigital number, since it uses as much as digits as its factorization.

397385843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The square root of 397385843 is about 19934.5389462611. The cubic root of 397385843 is about 735.1976841890.

The spelling of 397385843 in words is "three hundred ninety-seven million, three hundred eighty-five thousand, eight hundred forty-three".