397318 has 4 divisors (see below), whose sum is σ = 595980. Its totient is φ = 198658.

The previous prime is 397303. The next prime is 397337. The reversal of 397318 is 813793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 813793 = 421 ⋅1933.

It is a self number, because there is not a number n which added to its sum of digits gives 397318.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 99328 + ... + 99331.

It is an arithmetic number, because the mean of its divisors is an integer number (148995).

2³⁹⁷³¹⁸ is an apocalyptic number.

397318 is a deficient number, since it is larger than the sum of its proper divisors (198662).

397318 is a wasteful number, since it uses less digits than its factorization.

397318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198661.

The product of its digits is 4536, while the sum is 31.

The square root of 397318 is about 630.3316587321. The cubic root of 397318 is about 73.5155843363.

The spelling of 397318 in words is "three hundred ninety-seven thousand, three hundred eighteen".