397399 has 4 divisors (see below), whose sum is σ = 398664. Its totient is φ = 396136.

The previous prime is 397379. The next prime is 397427. The reversal of 397399 is 993793.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 397399 - 2⁹ = 396887 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (397379) 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, 249 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (99666).

2³⁹⁷³⁹⁹ is an apocalyptic number.

397399 is a deficient number, since it is larger than the sum of its proper divisors (1265).

397399 is an equidigital number, since it uses as much as digits as its factorization.

397399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264.

The product of its digits is 45927, while the sum is 40.

The square root of 397399 is about 630.3959073471. The cubic root of 397399 is about 73.5205797957.

The spelling of 397399 in words is "three hundred ninety-seven thousand, three hundred ninety-nine".