397397 has 16 divisors (see below), whose sum is σ = 534912. Its totient is φ = 285120.

The previous prime is 397379. The next prime is 397427. The reversal of 397397 is 793793.

It is not a de Polignac number, because 397397 - 2¹⁰ = 396373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803 + ... + 1199.

It is an arithmetic number, because the mean of its divisors is an integer number (33432).

2³⁹⁷³⁹⁷ is an apocalyptic number.

It is an amenable number.

397397 is a deficient number, since it is larger than the sum of its proper divisors (137515).

397397 is a wasteful number, since it uses less digits than its factorization.

397397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428.

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

The square root of 397397 is about 630.3943210404. The cubic root of 397397 is about 73.5204564592.

The spelling of 397397 in words is "three hundred ninety-seven thousand, three hundred ninety-seven".