397765 has 16 divisors (see below), whose sum is σ = 518400. Its totient is φ = 292032.

The previous prime is 397763. The next prime is 397799. The reversal of 397765 is 567793.

It is a cyclic number.

It is not a de Polignac number, because 397765 - 2¹ = 397763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4996 + ... + 5074.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2³⁹⁷⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

397765 is a deficient number, since it is larger than the sum of its proper divisors (120635).

397765 is a wasteful number, since it uses less digits than its factorization.

397765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

The product of its digits is 39690, while the sum is 37.

The square root of 397765 is about 630.6861343014. The cubic root of 397765 is about 73.5431434119.

The spelling of 397765 in words is "three hundred ninety-seven thousand, seven hundred sixty-five".