397393 has 4 divisors (see below), whose sum is σ = 399168. Its totient is φ = 395620.

The previous prime is 397379. The next prime is 397427. The reversal of 397393 is 393793.

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: 393793 = 31 ⋅12703.

It is a cyclic number.

It is not a de Polignac number, because 397393 - 2⁵ = 397361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397303) 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, 493 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

2³⁹⁷³⁹³ is an apocalyptic number.

It is an amenable number.

397393 is a deficient number, since it is larger than the sum of its proper divisors (1775).

397393 is a wasteful number, since it uses less digits than its factorization.

397393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774.

The product of its digits is 15309, while the sum is 34.

The square root of 397393 is about 630.3911484150. The cubic root of 397393 is about 73.5202097849.

Subtracting from 397393 its reverse (393793), we obtain a square (3600 = 60²).

The spelling of 397393 in words is "three hundred ninety-seven thousand, three hundred ninety-three".