397786017 has 16 divisors (see below), whose sum is σ = 552527360. Its totient is φ = 254275200.

The previous prime is 397786007. The next prime is 397786021. The reversal of 397786017 is 710687793.

It is a happy number.

It is not a de Polignac number, because 397786017 - 2⁸ = 397785761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397786007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9484 + ... + 29757.

It is an arithmetic number, because the mean of its divisors is an integer number (34532960).

Almost surely, 2^397786017 is an apocalyptic number.

It is an amenable number.

397786017 is a deficient number, since it is larger than the sum of its proper divisors (154741343).

397786017 is a wasteful number, since it uses less digits than its factorization.

397786017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39384.

The product of its (nonzero) digits is 444528, while the sum is 48.

The square root of 397786017 is about 19944.5736229181. The cubic root of 397786017 is about 735.4443867338. Note that the first 3 decimals are identical.

The spelling of 397786017 in words is "three hundred ninety-seven million, seven hundred eighty-six thousand, seventeen".