397109911 has 8 divisors (see below), whose sum is σ = 437045904. Its totient is φ = 357813120.

The previous prime is 397109903. The next prime is 397109959. The reversal of 397109911 is 119901793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397109911 - 2³ = 397109903 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 (397101911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158496 + ... + 160981.

It is an arithmetic number, because the mean of its divisors is an integer number (54630738).

Almost surely, 2^397109911 is an apocalyptic number.

397109911 is a deficient number, since it is larger than the sum of its proper divisors (39935993).

397109911 is a wasteful number, since it uses less digits than its factorization.

397109911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319601.

The product of its (nonzero) digits is 15309, while the sum is 40.

The square root of 397109911 is about 19927.6167917792. The cubic root of 397109911 is about 735.0274788807.

The spelling of 397109911 in words is "three hundred ninety-seven million, one hundred nine thousand, nine hundred eleven".