399160441 has 3 divisors (see below), whose sum is σ = 399180421. Its totient is φ = 399140462.

The previous prime is 399160427. The next prime is 399160451. The reversal of 399160441 is 144061993.

The square root of 399160441 is 19979.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 399160441 - 2⁷ = 399160313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399160441.

It is not an unprimeable number, because it can be changed into a prime (399160451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9990 + ... + 29968.

Almost surely, 2^399160441 is an apocalyptic number.

399160441 is the 19979-th square number.

399160441 is the 9990-th centered octagonal number.

It is an amenable number.

399160441 is a deficient number, since it is larger than the sum of its proper divisors (19980).

399160441 is an frugal number, since it uses more digits than its factorization.

399160441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39958 (or 19979 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The cubic root of 399160441 is about 736.2904450173.

The spelling of 399160441 in words is "three hundred ninety-nine million, one hundred sixty thousand, four hundred forty-one".