299681689 has 2 divisors, whose sum is σ = 299681690. Its totient is φ = 299681688.

The previous prime is 299681677. The next prime is 299681731. The reversal of 299681689 is 986186992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285880464 + 13801225 = 16908^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 299681689 - 2⁷ = 299681561 is a prime.

It is a super-2 number, since 2×299681689² = 179618229443785442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (299681659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149840844 + 149840845.

It is an arithmetic number, because the mean of its divisors is an integer number (149840845).

Almost surely, 2^299681689 is an apocalyptic number.

It is an amenable number.

299681689 is a deficient number, since it is larger than the sum of its proper divisors (1).

299681689 is an equidigital number, since it uses as much as digits as its factorization.

299681689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 58.

The square root of 299681689 is about 17311.3167898921. The cubic root of 299681689 is about 669.1961019923.

The spelling of 299681689 in words is "two hundred ninety-nine million, six hundred eighty-one thousand, six hundred eighty-nine".