399495 has 8 divisors (see below), whose sum is σ = 639216. Its totient is φ = 213056.

The previous prime is 399493. The next prime is 399499. The reversal of 399495 is 594993.

It is a happy number.

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 399495 - 2¹ = 399493 is a prime.

399495 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399491) 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, 13302 + ... + 13331.

It is an arithmetic number, because the mean of its divisors is an integer number (79902).

2³⁹⁹⁴⁹⁵ is an apocalyptic number.

399495 is a deficient number, since it is larger than the sum of its proper divisors (239721).

399495 is a wasteful number, since it uses less digits than its factorization.

399495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26641.

The product of its digits is 43740, while the sum is 39.

The square root of 399495 is about 632.0561683901. The cubic root of 399495 is about 73.6496096496.

The spelling of 399495 in words is "three hundred ninety-nine thousand, four hundred ninety-five".