987989403 has 16 divisors (see below), whose sum is σ = 1377582336. Its totient is φ = 628652640.

The previous prime is 987989383. The next prime is 987989419. The reversal of 987989403 is 304989789.

It is not a de Polignac number, because 987989403 - 2⁶ = 987989339 is a prime.

It is a super-2 number, since 2×987989403² = 1952246120880592818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (987989903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16893 + ... + 47553.

It is an arithmetic number, because the mean of its divisors is an integer number (86098896).

Almost surely, 2^987989403 is an apocalyptic number.

987989403 is a deficient number, since it is larger than the sum of its proper divisors (389592933).

987989403 is a wasteful number, since it uses less digits than its factorization.

987989403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31154.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 987989403 is about 31432.2987228106. The cubic root of 987989403 is about 995.9803315821.

The spelling of 987989403 in words is "nine hundred eighty-seven million, nine hundred eighty-nine thousand, four hundred three".