397291 has 8 divisors (see below), whose sum is σ = 414720. Its totient is φ = 380328.

The previous prime is 397289. The next prime is 397297. The reversal of 397291 is 192793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397291 - 2¹ = 397289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3660 + ... + 3766.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2³⁹⁷²⁹¹ is an apocalyptic number.

397291 is a deficient number, since it is larger than the sum of its proper divisors (17429).

397291 is a wasteful number, since it uses less digits than its factorization.

397291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its digits is 3402, while the sum is 31.

The square root of 397291 is about 630.3102410718. The cubic root of 397291 is about 73.5139190324.

The spelling of 397291 in words is "three hundred ninety-seven thousand, two hundred ninety-one".