87988073 has 6 divisors (see below), whose sum is σ = 93468606. Its totient is φ = 82812032.

The previous prime is 87988063. The next prime is 87988079. The reversal of 87988073 is 37088978.

It can be written as a sum of positive squares in 3 ways, for example, as 48888064 + 39100009 = 6992^2 + 6253^2 .

It is not a de Polignac number, because 87988073 - 2¹⁸ = 87725929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87988079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151940 + ... + 152517.

It is an arithmetic number, because the mean of its divisors is an integer number (15578101).

Almost surely, 2^87988073 is an apocalyptic number.

It is an amenable number.

87988073 is a deficient number, since it is larger than the sum of its proper divisors (5480533).

87988073 is a wasteful number, since it uses less digits than its factorization.

87988073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304491 (or 304474 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 87988073 is about 9380.1957868693. The cubic root of 87988073 is about 444.7759221980.

The spelling of 87988073 in words is "eighty-seven million, nine hundred eighty-eight thousand, seventy-three".