87990003 has 8 divisors (see below), whose sum is σ = 130355600. Its totient is φ = 58659984.

The previous prime is 87989987. The next prime is 87990029. The reversal of 87990003 is 30009978.

It is not a de Polignac number, because 87990003 - 2⁴ = 87989987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87990003.

It is not an unprimeable number, because it can be changed into a prime (87990503) 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, 1629418 + ... + 1629471.

It is an arithmetic number, because the mean of its divisors is an integer number (16294450).

Almost surely, 2^87990003 is an apocalyptic number.

87990003 is a deficient number, since it is larger than the sum of its proper divisors (42365597).

87990003 is a wasteful number, since it uses less digits than its factorization.

87990003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258898 (or 3258892 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 87990003 is about 9380.2986626226. The cubic root of 87990003 is about 444.7791741965.

The spelling of 87990003 in words is "eighty-seven million, nine hundred ninety thousand, three".