299881 has 2 divisors, whose sum is σ = 299882. Its totient is φ = 299880.

The previous prime is 299861. The next prime is 299891. The reversal of 299881 is 188992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 8281 = 540^2 + 91^2 .

It is a cyclic number.

It is not a de Polignac number, because 299881 - 2¹¹ = 297833 is a prime.

It is a super-2 number, since 2×299881² = 179857228322, which contains 22 as substring.

It is a Chen prime.

299881 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 299881.

It is not a weakly prime, because it can be changed into another prime (299861) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149940 + 149941.

It is an arithmetic number, because the mean of its divisors is an integer number (149941).

2²⁹⁹⁸⁸¹ is an apocalyptic number.

It is an amenable number.

299881 is a deficient number, since it is larger than the sum of its proper divisors (1).

299881 is an equidigital number, since it uses as much as digits as its factorization.

299881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 299881 is about 547.6139150898. The cubic root of 299881 is about 66.9344424464.

Adding to 299881 its product of digits (10368), we get a square (310249 = 557²).

Subtracting from 299881 its reverse (188992), we obtain a square (110889 = 333²).

The spelling of 299881 in words is "two hundred ninety-nine thousand, eight hundred eighty-one".