299285981 has 2 divisors, whose sum is σ = 299285982. Its totient is φ = 299285980.

The previous prime is 299285971. The next prime is 299285983. The reversal of 299285981 is 189582992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285103225 + 14182756 = 16885^2 + 3766^2 .

It is a cyclic number.

It is not a de Polignac number, because 299285981 - 2²² = 295091677 is a prime.

It is a super-2 number, since 2×299285981² = 179144196846264722, which contains 22 as substring.

Together with 299285983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299285983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149642990 + 149642991.

It is an arithmetic number, because the mean of its divisors is an integer number (149642991).

Almost surely, 2^299285981 is an apocalyptic number.

It is an amenable number.

299285981 is a deficient number, since it is larger than the sum of its proper divisors (1).

299285981 is an equidigital number, since it uses as much as digits as its factorization.

299285981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 53.

The square root of 299285981 is about 17299.8838435407. The cubic root of 299285981 is about 668.9014305693.

The spelling of 299285981 in words is "two hundred ninety-nine million, two hundred eighty-five thousand, nine hundred eighty-one".