989999907 has 16 divisors (see below), whose sum is σ = 1426097568. Its totient is φ = 607276800.

The previous prime is 989999887. The next prime is 989999909. The reversal of 989999907 is 709999989.

It is not a de Polignac number, because 989999907 - 2⁷ = 989999779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989999909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28344 + ... + 52757.

It is an arithmetic number, because the mean of its divisors is an integer number (89131098).

Almost surely, 2^989999907 is an apocalyptic number.

989999907 is a deficient number, since it is larger than the sum of its proper divisors (436097661).

989999907 is a wasteful number, since it uses less digits than its factorization.

989999907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81430.

The product of its (nonzero) digits is 29760696, while the sum is 69.

The square root of 989999907 is about 31464.2639672375. The cubic root of 989999907 is about 996.6554622042.

The spelling of 989999907 in words is "nine hundred eighty-nine million, nine hundred ninety-nine thousand, nine hundred seven".