397025806 has 4 divisors (see below), whose sum is σ = 595538712. Its totient is φ = 198512902.

The previous prime is 397025791. The next prime is 397025819. The reversal of 397025806 is 608520793.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99256450 + ... + 99256453.

It is an arithmetic number, because the mean of its divisors is an integer number (148884678).

Almost surely, 2^397025806 is an apocalyptic number.

397025806 is a deficient number, since it is larger than the sum of its proper divisors (198512906).

397025806 is a wasteful number, since it uses less digits than its factorization.

397025806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198512905.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 397025806 is about 19925.5064176547. The cubic root of 397025806 is about 734.9755840533.

The spelling of 397025806 in words is "three hundred ninety-seven million, twenty-five thousand, eight hundred six".