397911 has 4 divisors (see below), whose sum is σ = 530552. Its totient is φ = 265272.

The previous prime is 397907. The next prime is 397921. The reversal of 397911 is 119793.

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

It is not a de Polignac number, because 397911 - 2² = 397907 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397921) 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, 66316 + ... + 66321.

It is an arithmetic number, because the mean of its divisors is an integer number (132638).

2³⁹⁷⁹¹¹ is an apocalyptic number.

397911 is a deficient number, since it is larger than the sum of its proper divisors (132641).

397911 is a wasteful number, since it uses less digits than its factorization.

397911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132640.

The product of its digits is 1701, while the sum is 30.

The square root of 397911 is about 630.8018706377. The cubic root of 397911 is about 73.5521403368.

The spelling of 397911 in words is "three hundred ninety-seven thousand, nine hundred eleven".