399479 has 4 divisors (see below), whose sum is σ = 404376. Its totient is φ = 394584.

The previous prime is 399473. The next prime is 399481. The reversal of 399479 is 974993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974993 = 23 ⋅42391.

It is a cyclic number.

It is not a de Polignac number, because 399479 - 2¹² = 395383 is a prime.

It is a super-3 number, since 3×399479³ = 191250736763337717, which contains 333 as substring.

It is a d-powerful number, because it can be written as 3 + 9⁴ + 4⁹ + 9⁴ + 7⁶ + 9⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399473) 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, 2324 + ... + 2489.

It is an arithmetic number, because the mean of its divisors is an integer number (101094).

2³⁹⁹⁴⁷⁹ is an apocalyptic number.

399479 is a deficient number, since it is larger than the sum of its proper divisors (4897).

399479 is an equidigital number, since it uses as much as digits as its factorization.

399479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its digits is 61236, while the sum is 41.

The square root of 399479 is about 632.0435111604. The cubic root of 399479 is about 73.6486264004.

It can be divided in two parts, 399 and 479, that added together give a palindrome (878).

The spelling of 399479 in words is "three hundred ninety-nine thousand, four hundred seventy-nine".