397317 has 4 divisors (see below), whose sum is σ = 529760. Its totient is φ = 264876.

The previous prime is 397303. The next prime is 397337. The reversal of 397317 is 713793.

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 397317 - 2⁴ = 397301 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66217 + ... + 66222.

It is an arithmetic number, because the mean of its divisors is an integer number (132440).

2³⁹⁷³¹⁷ is an apocalyptic number.

It is an amenable number.

397317 is a deficient number, since it is larger than the sum of its proper divisors (132443).

397317 is a wasteful number, since it uses less digits than its factorization.

397317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132442.

The product of its digits is 3969, while the sum is 30.

The square root of 397317 is about 630.3308654984. The cubic root of 397317 is about 73.5155226598.

The spelling of 397317 in words is "three hundred ninety-seven thousand, three hundred seventeen".