363999 has 4 divisors (see below), whose sum is σ = 485336. Its totient is φ = 242664.

The previous prime is 363989. The next prime is 364027. The reversal of 363999 is 999363.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 363999 - 2⁵ = 363967 is a prime.

It is a D-number.

It is a Duffinian number.

363999 is a modest number, since divided by 999 gives 363 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (363949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60664 + ... + 60669.

It is an arithmetic number, because the mean of its divisors is an integer number (121334).

2³⁶³⁹⁹⁹ is an apocalyptic number.

363999 is a deficient number, since it is larger than the sum of its proper divisors (121337).

363999 is a wasteful number, since it uses less digits than its factorization.

363999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121336.

The product of its digits is 39366, while the sum is 39.

The square root of 363999 is about 603.3232964174. The cubic root of 363999 is about 71.4003044342.

The spelling of 363999 in words is "three hundred sixty-three thousand, nine hundred ninety-nine".