987331603 has 4 divisors (see below), whose sum is σ = 1030259088. Its totient is φ = 944404120.

The previous prime is 987331589. The next prime is 987331711. The reversal of 987331603 is 306133789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987331603 - 2⁹ = 987331091 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987311603) 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 3 ways as a sum of consecutive naturals, for example, 21463708 + ... + 21463753.

It is an arithmetic number, because the mean of its divisors is an integer number (257564772).

Almost surely, 2^987331603 is an apocalyptic number.

987331603 is a deficient number, since it is larger than the sum of its proper divisors (42927485).

987331603 is a wasteful number, since it uses less digits than its factorization.

987331603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42927484.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 987331603 is about 31421.8332215038. The cubic root of 987331603 is about 995.7592423969.

The spelling of 987331603 in words is "nine hundred eighty-seven million, three hundred thirty-one thousand, six hundred three".