399497 has 12 divisors (see below), whose sum is σ = 481536. Its totient is φ = 330120.

The previous prime is 399493. The next prime is 399499. The reversal of 399497 is 794993.

It is not a de Polignac number, because 399497 - 2² = 399493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1388 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (40128).

2³⁹⁹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

399497 is a deficient number, since it is larger than the sum of its proper divisors (82039).

399497 is a wasteful number, since it uses less digits than its factorization.

399497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 301 counting only the distinct ones).

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

The square root of 399497 is about 632.0577505260. The cubic root of 399497 is about 73.6497325540.

The spelling of 399497 in words is "three hundred ninety-nine thousand, four hundred ninety-seven".