399499 has 2 divisors, whose sum is σ = 399500. Its totient is φ = 399498.

The previous prime is 399493. The next prime is 399523. The reversal of 399499 is 994993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399499 - 2³ = 399491 is a prime.

It is not a weakly prime, because it can be changed into another prime (399491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199749 + 199750.

It is an arithmetic number, because the mean of its divisors is an integer number (199750).

2³⁹⁹⁴⁹⁹ is an apocalyptic number.

399499 is a deficient number, since it is larger than the sum of its proper divisors (1).

399499 is an equidigital number, since it uses as much as digits as its factorization.

399499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 43.

The square root of 399499 is about 632.0593326579. The cubic root of 399499 is about 73.6498554579.

It can be divided in two parts, 399 and 499, that added together give a palindrome (898).

The spelling of 399499 in words is "three hundred ninety-nine thousand, four hundred ninety-nine".