87987530 has 16 divisors (see below), whose sum is σ = 158942304. Its totient is φ = 35069520.

The previous prime is 87987527. The next prime is 87987533. The reversal of 87987530 is 3578978.

It is an interprime number because it is at equal distance from previous prime (87987527) and next prime (87987533).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87987533) 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, 12716 + ... + 18375.

It is an arithmetic number, because the mean of its divisors is an integer number (9933894).

Almost surely, 2^87987530 is an apocalyptic number.

87987530 is a deficient number, since it is larger than the sum of its proper divisors (70954774).

87987530 is a wasteful number, since it uses less digits than its factorization.

87987530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31381.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 87987530 is about 9380.1668428659. The cubic root of 87987530 is about 444.7750072489.

The spelling of 87987530 in words is "eighty-seven million, nine hundred eighty-seven thousand, five hundred thirty".