397706859 has 24 divisors (see below), whose sum is σ = 638522352. Its totient is φ = 236483520.

The previous prime is 397706849. The next prime is 397706861. The reversal of 397706859 is 958607793.

It is not a de Polignac number, because 397706859 - 2¹² = 397702763 is a prime.

It is a super-3 number, since 3×397706859³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (397706849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32652 + ... + 43145.

It is an arithmetic number, because the mean of its divisors is an integer number (26605098).

Almost surely, 2^397706859 is an apocalyptic number.

397706859 is a deficient number, since it is larger than the sum of its proper divisors (240815493).

397706859 is a wasteful number, since it uses less digits than its factorization.

397706859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75867 (or 75864 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The square root of 397706859 is about 19942.5890746412. The cubic root of 397706859 is about 735.3955998934.

The spelling of 397706859 in words is "three hundred ninety-seven million, seven hundred six thousand, eight hundred fifty-nine".