299805 has 32 divisors (see below), whose sum is σ = 552960. Its totient is φ = 137280.

The previous prime is 299777. The next prime is 299807. The reversal of 299805 is 508992.

It is not a de Polignac number, because 299805 - 2¹¹ = 297757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (299807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3756 + ... + 3834.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2²⁹⁹⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

299805 is a deficient number, since it is larger than the sum of its proper divisors (253155).

299805 is a wasteful number, since it uses less digits than its factorization.

299805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 299805 is about 547.5445187380. The cubic root of 299805 is about 66.9287874839.

The spelling of 299805 in words is "two hundred ninety-nine thousand, eight hundred five".