397319173 has 4 divisors (see below), whose sum is σ = 398865420. Its totient is φ = 395772928.

The previous prime is 397319161. The next prime is 397319231. The reversal of 397319173 is 371913793.

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

It can be written as a sum of positive squares in 2 ways, for example, as 263153284 + 134165889 = 16222^2 + 11583^2 .

It is a cyclic number.

It is not a de Polignac number, because 397319173 - 2¹⁷ = 397188101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397319113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772738 + ... + 773251.

It is an arithmetic number, because the mean of its divisors is an integer number (99716355).

Almost surely, 2^397319173 is an apocalyptic number.

It is an amenable number.

397319173 is a deficient number, since it is larger than the sum of its proper divisors (1546247).

397319173 is a wasteful number, since it uses less digits than its factorization.

397319173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546246.

The product of its digits is 107163, while the sum is 43.

The square root of 397319173 is about 19932.8666528425. The cubic root of 397319173 is about 735.1565668284.

The spelling of 397319173 in words is "three hundred ninety-seven million, three hundred nineteen thousand, one hundred seventy-three".