397345 has 8 divisors (see below), whose sum is σ = 513576. Its totient is φ = 293376.

The previous prime is 397337. The next prime is 397351. The reversal of 397345 is 543793.

It can be written as a sum of positive squares in 4 ways, for example, as 9216 + 388129 = 96^2 + 623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397345 - 2³ = 397337 is a prime.

It is a Duffinian number.

397345 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2992 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (64197).

2³⁹⁷³⁴⁵ is an apocalyptic number.

It is an amenable number.

397345 is a deficient number, since it is larger than the sum of its proper divisors (116231).

397345 is a wasteful number, since it uses less digits than its factorization.

397345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131.

The product of its digits is 11340, while the sum is 31.

The square root of 397345 is about 630.3530756647. The cubic root of 397345 is about 73.5172495649.

The spelling of 397345 in words is "three hundred ninety-seven thousand, three hundred forty-five".