989622899 has 4 divisors (see below), whose sum is σ = 989862120. Its totient is φ = 989383680.

The previous prime is 989622869. The next prime is 989622913. The reversal of 989622899 is 998226989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998226989 = 269 ⋅3710881.

It is a cyclic number.

It is not a de Polignac number, because 989622899 - 2²⁴ = 972845683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989622859) 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 in 3 ways as a sum of consecutive naturals, for example, 113294 + ... + 121715.

It is an arithmetic number, because the mean of its divisors is an integer number (247465530).

Almost surely, 2^989622899 is an apocalyptic number.

989622899 is a deficient number, since it is larger than the sum of its proper divisors (239221).

989622899 is a wasteful number, since it uses less digits than its factorization.

989622899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239220.

The product of its digits is 10077696, while the sum is 62.

The square root of 989622899 is about 31458.2723460777. The cubic root of 989622899 is about 996.5289319602.

The spelling of 989622899 in words is "nine hundred eighty-nine million, six hundred twenty-two thousand, eight hundred ninety-nine".