397195999 has 4 divisors (see below), whose sum is σ = 407931064. Its totient is φ = 386460936.

The previous prime is 397195943. The next prime is 397196003. The reversal of 397195999 is 999591793.

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

It is a cyclic number.

It is not a de Polignac number, because 397195999 - 2²⁷ = 262978271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397195499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5367477 + ... + 5367550.

It is an arithmetic number, because the mean of its divisors is an integer number (101982766).

Almost surely, 2^397195999 is an apocalyptic number.

397195999 is a deficient number, since it is larger than the sum of its proper divisors (10735065).

397195999 is a wasteful number, since it uses less digits than its factorization.

397195999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735064.

The product of its digits is 6200145, while the sum is 61.

The square root of 397195999 is about 19929.7766921760. The cubic root of 397195999 is about 735.0805896794.

The spelling of 397195999 in words is "three hundred ninety-seven million, one hundred ninety-five thousand, nine hundred ninety-nine".