397445859 has 20 divisors (see below), whose sum is σ = 602086320. Its totient is φ = 261228240.

The previous prime is 397445843. The next prime is 397445869. The reversal of 397445859 is 958544793.

It is not a de Polignac number, because 397445859 - 2⁴ = 397445843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397445869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28804 + ... + 40305.

It is an arithmetic number, because the mean of its divisors is an integer number (30104316).

Almost surely, 2^397445859 is an apocalyptic number.

397445859 is a deficient number, since it is larger than the sum of its proper divisors (204640461).

397445859 is an equidigital number, since it uses as much as digits as its factorization.

397445859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69192 (or 69183 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 397445859 is about 19936.0442164437. The cubic root of 397445859 is about 735.2346938979.

The spelling of 397445859 in words is "three hundred ninety-seven million, four hundred forty-five thousand, eight hundred fifty-nine".