399513 has 16 divisors (see below), whose sum is σ = 577280. Its totient is φ = 244944.

The previous prime is 399499. The next prime is 399523. The reversal of 399513 is 315993.

It is not a de Polignac number, because 399513 - 2⁵ = 399481 is a prime.

It is a super-2 number, since 2×399513² = 319221274338, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

399513 is a modest number, since divided by 513 gives 399 as remainder.

It is not an unprimeable number, because it can be changed into a prime (399523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2370 + ... + 2532.

It is an arithmetic number, because the mean of its divisors is an integer number (36080).

2³⁹⁹⁵¹³ is an apocalyptic number.

It is an amenable number.

399513 is a deficient number, since it is larger than the sum of its proper divisors (177767).

399513 is a wasteful number, since it uses less digits than its factorization.

399513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its digits is 3645, while the sum is 30.

The square root of 399513 is about 632.0704074706. The cubic root of 399513 is about 73.6507157737.

The spelling of 399513 in words is "three hundred ninety-nine thousand, five hundred thirteen".