397655 has 4 divisors (see below), whose sum is σ = 477192. Its totient is φ = 318120.

The previous prime is 397643. The next prime is 397673. The reversal of 397655 is 556793.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 397655 - 2⁶ = 397591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39761 + ... + 39770.

It is an arithmetic number, because the mean of its divisors is an integer number (119298).

2³⁹⁷⁶⁵⁵ is an apocalyptic number.

397655 is a deficient number, since it is larger than the sum of its proper divisors (79537).

397655 is an equidigital number, since it uses as much as digits as its factorization.

397655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79536.

The product of its digits is 28350, while the sum is 35.

The square root of 397655 is about 630.5989216610. The cubic root of 397655 is about 73.5363634526.

The spelling of 397655 in words is "three hundred ninety-seven thousand, six hundred fifty-five".