299969 has 2 divisors, whose sum is σ = 299970. Its totient is φ = 299968.

The previous prime is 299951. The next prime is 299977. The reversal of 299969 is 969992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255025 + 44944 = 505^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 299969 - 2¹² = 295873 is a prime.

It is a super-2 number, since 2×299969² = 179962801922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 299969.

It is not a weakly prime, because it can be changed into another prime (299909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149984 + 149985.

It is an arithmetic number, because the mean of its divisors is an integer number (149985).

2²⁹⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

299969 is a deficient number, since it is larger than the sum of its proper divisors (1).

299969 is an equidigital number, since it uses as much as digits as its factorization.

299969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 44.

The square root of 299969 is about 547.6942577753. The cubic root of 299969 is about 66.9409891042.

Subtracting from 299969 its sum of digits (44), we obtain a triangular number (299925 = T₇₇₄).

The spelling of 299969 in words is "two hundred ninety-nine thousand, nine hundred sixty-nine".