87639003 has 20 divisors (see below), whose sum is σ = 131599600. Its totient is φ = 58121712.

The previous prime is 87638981. The next prime is 87639011. The reversal of 87639003 is 30093678.

It is not a de Polignac number, because 87639003 - 2⁹ = 87638491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87639023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13401 + ... + 18837.

It is an arithmetic number, because the mean of its divisors is an integer number (6579980).

Almost surely, 2^87639003 is an apocalyptic number.

87639003 is a deficient number, since it is larger than the sum of its proper divisors (43960597).

87639003 is a wasteful number, since it uses less digits than its factorization.

87639003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5648 (or 5639 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 87639003 is about 9361.5705413141. The cubic root of 87639003 is about 444.1869647220.

It can be divided in two parts, 8763 and 9003, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 87639003 in words is "eighty-seven million, six hundred thirty-nine thousand, three".