399487 has 8 divisors (see below), whose sum is σ = 455040. Its totient is φ = 347160.

The previous prime is 399481. The next prime is 399491. The reversal of 399487 is 784993.

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

It is a de Polignac number, because none of the positive numbers 2^k-399487 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537 + ... + 1042.

It is an arithmetic number, because the mean of its divisors is an integer number (56880).

2³⁹⁹⁴⁸⁷ is an apocalyptic number.

399487 is a deficient number, since it is larger than the sum of its proper divisors (55553).

399487 is a wasteful number, since it uses less digits than its factorization.

399487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613.

The product of its digits is 54432, while the sum is 40.

The square root of 399487 is about 632.0498398070. The cubic root of 399487 is about 73.6491180283.

The spelling of 399487 in words is "three hundred ninety-nine thousand, four hundred eighty-seven".