399487303 has 4 divisors (see below), whose sum is σ = 400909248. Its totient is φ = 398065360.

The previous prime is 399487273. The next prime is 399487337. The reversal of 399487303 is 303784993.

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

It is a cyclic number.

It is not a de Polignac number, because 399487303 - 2⁵ = 399487271 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 (399487373) 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, 710551 + ... + 711112.

It is an arithmetic number, because the mean of its divisors is an integer number (100227312).

Almost surely, 2^399487303 is an apocalyptic number.

399487303 is a deficient number, since it is larger than the sum of its proper divisors (1421945).

399487303 is a wasteful number, since it uses less digits than its factorization.

399487303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421944.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 399487303 is about 19987.1784652061. The cubic root of 399487303 is about 736.4913664857.

The spelling of 399487303 in words is "three hundred ninety-nine million, four hundred eighty-seven thousand, three hundred three".