305299 has 4 divisors (see below), whose sum is σ = 307336. Its totient is φ = 303264.

The previous prime is 305297. The next prime is 305329. The reversal of 305299 is 992503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 992503 = 19 ⋅52237.

It is a cyclic number.

It is not a de Polignac number, because 305299 - 2¹ = 305297 is a prime.

It is a Duffinian number.

305299 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (305297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774 + ... + 1099.

It is an arithmetic number, because the mean of its divisors is an integer number (76834).

2³⁰⁵²⁹⁹ is an apocalyptic number.

305299 is a deficient number, since it is larger than the sum of its proper divisors (2037).

305299 is a wasteful number, since it uses less digits than its factorization.

305299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 305299 is about 552.5386864284. The cubic root of 305299 is about 67.3351441093.

It can be divided in two parts, 30 and 5299, that added together give a square (5329 = 73²).

The spelling of 305299 in words is "three hundred five thousand, two hundred ninety-nine".