397256171 has 8 divisors (see below), whose sum is σ = 428270304. Its totient is φ = 366307200.

The previous prime is 397256149. The next prime is 397256183. The reversal of 397256171 is 171652793.

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 397256171 - 2¹⁸ = 396994027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397256191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3230 + ... + 28371.

It is an arithmetic number, because the mean of its divisors is an integer number (53533788).

Almost surely, 2^397256171 is an apocalyptic number.

397256171 is a deficient number, since it is larger than the sum of its proper divisors (31014133).

397256171 is a wasteful number, since it uses less digits than its factorization.

397256171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32581.

The product of its digits is 79380, while the sum is 41.

The square root of 397256171 is about 19931.2862354641. The cubic root of 397256171 is about 735.1177074046.

The spelling of 397256171 in words is "three hundred ninety-seven million, two hundred fifty-six thousand, one hundred seventy-one".