299117989 has 2 divisors, whose sum is σ = 299117990. Its totient is φ = 299117988.

The previous prime is 299117981. The next prime is 299117999. The reversal of 299117989 is 989711992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298944100 + 173889 = 17290^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 299117989 - 2³ = 299117981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299117981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149558994 + 149558995.

It is an arithmetic number, because the mean of its divisors is an integer number (149558995).

Almost surely, 2^299117989 is an apocalyptic number.

It is an amenable number.

299117989 is a deficient number, since it is larger than the sum of its proper divisors (1).

299117989 is an equidigital number, since it uses as much as digits as its factorization.

299117989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 55.

The square root of 299117989 is about 17295.0278693039. The cubic root of 299117989 is about 668.7762536175.

The spelling of 299117989 in words is "two hundred ninety-nine million, one hundred seventeen thousand, nine hundred eighty-nine".