989668699 has 2 divisors, whose sum is σ = 989668700. Its totient is φ = 989668698.

The previous prime is 989668663. The next prime is 989668717. The reversal of 989668699 is 996866989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989668699 - 2⁷ = 989668571 is a prime.

It is not a weakly prime, because it can be changed into another prime (989668609) 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, 494834349 + 494834350.

It is an arithmetic number, because the mean of its divisors is an integer number (494834350).

Almost surely, 2^989668699 is an apocalyptic number.

989668699 is a deficient number, since it is larger than the sum of its proper divisors (1).

989668699 is an equidigital number, since it uses as much as digits as its factorization.

989668699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90699264, while the sum is 70.

The square root of 989668699 is about 31459.0002860867. Note that the first 3 decimals coincide. The cubic root of 989668699 is about 996.5443049273.

The spelling of 989668699 in words is "nine hundred eighty-nine million, six hundred sixty-eight thousand, six hundred ninety-nine".