299987 has 4 divisors (see below), whose sum is σ = 309696. Its totient is φ = 290280.

The previous prime is 299983. The next prime is 299993. The reversal of 299987 is 789992.

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

It is a cyclic number.

It is not a de Polignac number, because 299987 - 2² = 299983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (299983) 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, 4808 + ... + 4869.

It is an arithmetic number, because the mean of its divisors is an integer number (77424).

2²⁹⁹⁹⁸⁷ is an apocalyptic number.

299987 is a deficient number, since it is larger than the sum of its proper divisors (9709).

299987 is an equidigital number, since it uses as much as digits as its factorization.

299987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708.

The product of its digits is 81648, while the sum is 44.

The square root of 299987 is about 547.7106900545. The cubic root of 299987 is about 66.9423280355.

The spelling of 299987 in words is "two hundred ninety-nine thousand, nine hundred eighty-seven".