399469 has 8 divisors (see below), whose sum is σ = 460800. Its totient is φ = 339216.

The previous prime is 399439. The next prime is 399473. The reversal of 399469 is 964993.

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 399469 - 2¹⁵ = 366701 is a prime.

It is a super-2 number, since 2×399469² = 319150963922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399409) 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, 852 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (57600).

2³⁹⁹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

399469 is a deficient number, since it is larger than the sum of its proper divisors (61331).

399469 is a wasteful number, since it uses less digits than its factorization.

399469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539.

The product of its digits is 52488, while the sum is 40.

The square root of 399469 is about 632.0356002631. The cubic root of 399469 is about 73.6480118563.

It can be divided in two parts, 399 and 469, that added together give a palindrome (868).

The spelling of 399469 in words is "three hundred ninety-nine thousand, four hundred sixty-nine".