397165 has 4 divisors (see below), whose sum is σ = 476604. Its totient is φ = 317728.

The previous prime is 397153. The next prime is 397181. The reversal of 397165 is 561793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561793 = 347 ⋅1619.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 145161 = 502^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 397165 - 2⁷ = 397037 is a prime.

It is a Smith number, since the sum of its digits (31) 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.

397165 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39712 + ... + 39721.

It is an arithmetic number, because the mean of its divisors is an integer number (119151).

2³⁹⁷¹⁶⁵ is an apocalyptic number.

It is an amenable number.

397165 is a deficient number, since it is larger than the sum of its proper divisors (79439).

397165 is an equidigital number, since it uses as much as digits as its factorization.

397165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79438.

The product of its digits is 5670, while the sum is 31.

The square root of 397165 is about 630.2102823661. The cubic root of 397165 is about 73.5061466160.

The spelling of 397165 in words is "three hundred ninety-seven thousand, one hundred sixty-five".