90587987 has 8 divisors (see below), whose sum is σ = 103608576. Its totient is φ = 77587272.

The previous prime is 90587947. The next prime is 90587993. The reversal of 90587987 is 78978509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90587987 - 2⁶ = 90587923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90587947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6608 + ... + 14994.

It is an arithmetic number, because the mean of its divisors is an integer number (12951072).

Almost surely, 2^90587987 is an apocalyptic number.

90587987 is a deficient number, since it is larger than the sum of its proper divisors (13020589).

90587987 is a wasteful number, since it uses less digits than its factorization.

90587987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 90587987 is about 9517.7721657959. The cubic root of 90587987 is about 449.1142858170.

The spelling of 90587987 in words is "ninety million, five hundred eighty-seven thousand, nine hundred eighty-seven".