299689 has 4 divisors (see below), whose sum is σ = 322756. Its totient is φ = 276624.

The previous prime is 299683. The next prime is 299699. The reversal of 299689 is 986992.

299689 is nontrivially palindromic in base 12.

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

It can be written as a sum of positive squares in 2 ways, for example, as 133225 + 166464 = 365^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 299689 - 2³ = 299681 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (299681) 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, 11514 + ... + 11539.

It is an arithmetic number, because the mean of its divisors is an integer number (80689).

2²⁹⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

299689 is a deficient number, since it is larger than the sum of its proper divisors (23067).

299689 is a wasteful number, since it uses less digits than its factorization.

299689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23066.

The product of its digits is 69984, while the sum is 43.

The square root of 299689 is about 547.4385810299. The cubic root of 299689 is about 66.9201543825.

The spelling of 299689 in words is "two hundred ninety-nine thousand, six hundred eighty-nine".