397937 has 4 divisors (see below), whose sum is σ = 399360. Its totient is φ = 396516.

The previous prime is 397921. The next prime is 397939. The reversal of 397937 is 739793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 739793 = 227 ⋅3259.

It is a cyclic number.

It is not a de Polignac number, because 397937 - 2⁴ = 397921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397937.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 397937.

It is not an unprimeable number, because it can be changed into a prime (397939) 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, 137 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (99840).

2³⁹⁷⁹³⁷ is an apocalyptic number.

It is an amenable number.

397937 is a deficient number, since it is larger than the sum of its proper divisors (1423).

397937 is a wasteful number, since it uses less digits than its factorization.

397937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its digits is 35721, while the sum is 38.

The square root of 397937 is about 630.8224789907. The cubic root of 397937 is about 73.5537422981.

The spelling of 397937 in words is "three hundred ninety-seven thousand, nine hundred thirty-seven".