397564 has 6 divisors (see below), whose sum is σ = 695744. Its totient is φ = 198780.

The previous prime is 397549. The next prime is 397567. The reversal of 397564 is 465793.

397564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49692 + ... + 49699.

2³⁹⁷⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

397564 is a deficient number, since it is larger than the sum of its proper divisors (298180).

397564 is a wasteful number, since it uses less digits than its factorization.

397564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99395 (or 99393 counting only the distinct ones).

The product of its digits is 22680, while the sum is 34.

The square root of 397564 is about 630.5267639046. The cubic root of 397564 is about 73.5307536320.

It can be divided in two parts, 397 and 564, that added together give a square (961 = 31²).

The spelling of 397564 in words is "three hundred ninety-seven thousand, five hundred sixty-four".