397507 has 4 divisors (see below), whose sum is σ = 433656. Its totient is φ = 361360.

The previous prime is 397493. The next prime is 397517. The reversal of 397507 is 705793.

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

It is a cyclic number.

It is not a de Polignac number, because 397507 - 2⁷ = 397379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18058 + ... + 18079.

It is an arithmetic number, because the mean of its divisors is an integer number (108414).

2³⁹⁷⁵⁰⁷ is an apocalyptic number.

397507 is a deficient number, since it is larger than the sum of its proper divisors (36149).

397507 is a wasteful number, since it uses less digits than its factorization.

397507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36148.

The product of its (nonzero) digits is 6615, while the sum is 31.

The square root of 397507 is about 630.4815619826. The cubic root of 397507 is about 73.5272393523.

The spelling of 397507 in words is "three hundred ninety-seven thousand, five hundred seven".