999989299 has 2 divisors, whose sum is σ = 999989300. Its totient is φ = 999989298.

The previous prime is 999989297. The next prime is 999989321. The reversal of 999989299 is 992989999.

It is a happy number.

999989299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999989299 - 2¹ = 999989297 is a prime.

It is a super-2 number, since 2×999989299² = 1999957196229022802, which contains 22 as substring.

Together with 999989297, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999989293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994649 + 499994650.

It is an arithmetic number, because the mean of its divisors is an integer number (499994650).

Almost surely, 2^999989299 is an apocalyptic number.

999989299 is a deficient number, since it is larger than the sum of its proper divisors (1).

999989299 is an equidigital number, since it uses as much as digits as its factorization.

999989299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76527504, while the sum is 73.

The square root of 999989299 is about 31622.6074035649. The cubic root of 999989299 is about 999.9964329873.

The spelling of 999989299 in words is "nine hundred ninety-nine million, nine hundred eighty-nine thousand, two hundred ninety-nine".