305899 has 4 divisors (see below), whose sum is σ = 333720. Its totient is φ = 278080.

The previous prime is 305873. The next prime is 305917. The reversal of 305899 is 998503.

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

It is not a de Polignac number, because 305899 - 2⁵ = 305867 is a prime.

It is a Duffinian number.

305899 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (305839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13894 + ... + 13915.

It is an arithmetic number, because the mean of its divisors is an integer number (83430).

2³⁰⁵⁸⁹⁹ is an apocalyptic number.

305899 is a deficient number, since it is larger than the sum of its proper divisors (27821).

305899 is a wasteful number, since it uses less digits than its factorization.

305899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27820.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 305899 is about 553.0813683356. The cubic root of 305899 is about 67.3792261936.

It can be divided in two parts, 30 and 5899, that added together give a square (5929 = 77²).

The spelling of 305899 in words is "three hundred five thousand, eight hundred ninety-nine".