397569 has 4 divisors (see below), whose sum is σ = 530096. Its totient is φ = 265044.

The previous prime is 397567. The next prime is 397589. The reversal of 397569 is 965793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 397569 - 2¹ = 397567 is a prime.

It is a super-2 number, since 2×397569² = 316122219522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

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

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 3 ways as a sum of consecutive naturals, for example, 66259 + ... + 66264.

It is an arithmetic number, because the mean of its divisors is an integer number (132524).

2³⁹⁷⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

397569 is a deficient number, since it is larger than the sum of its proper divisors (132527).

397569 is a wasteful number, since it uses less digits than its factorization.

397569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132526.

The product of its digits is 51030, while the sum is 39.

The square root of 397569 is about 630.5307288309. The cubic root of 397569 is about 73.5310618861.

The spelling of 397569 in words is "three hundred ninety-seven thousand, five hundred sixty-nine".