987799994 has 16 divisors (see below), whose sum is σ = 1571501736. Its totient is φ = 464064000.

The previous prime is 987799993. The next prime is 987799997. The reversal of 987799994 is 499997789.

987799994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 972628969 + 15171025 = 31187^2 + 3895^2 .

It is not an unprimeable number, because it can be changed into a prime (987799993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3737 + ... + 44604.

Almost surely, 2^987799994 is an apocalyptic number.

987799994 is a deficient number, since it is larger than the sum of its proper divisors (583701742).

987799994 is a wasteful number, since it uses less digits than its factorization.

987799994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48961.

The product of its digits is 92588832, while the sum is 71.

The square root of 987799994 is about 31429.2856107166. The cubic root of 987799994 is about 995.9166805298.

The spelling of 987799994 in words is "nine hundred eighty-seven million, seven hundred ninety-nine thousand, nine hundred ninety-four".