397927 has 4 divisors (see below), whose sum is σ = 399280. Its totient is φ = 396576.

The previous prime is 397921. The next prime is 397939. The reversal of 397927 is 729793.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 729793 = 17 ⋅42929.

It is a cyclic number.

It is not a de Polignac number, because 397927 - 2⁷ = 397799 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 (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, 27 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (99820).

2³⁹⁷⁹²⁷ is an apocalyptic number.

397927 is a deficient number, since it is larger than the sum of its proper divisors (1353).

397927 is an equidigital number, since it uses as much as digits as its factorization.

397927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352.

The product of its digits is 23814, while the sum is 37.

The square root of 397927 is about 630.8145527808. The cubic root of 397927 is about 73.5531261674.

The spelling of 397927 in words is "three hundred ninety-seven thousand, nine hundred twenty-seven".