87531633 has 24 divisors (see below), whose sum is σ = 146952000. Its totient is φ = 49168224.

The previous prime is 87531611. The next prime is 87531649. The reversal of 87531633 is 33613578.

It is not a de Polignac number, because 87531633 - 2⁵ = 87531601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87531133) 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 23 ways as a sum of consecutive naturals, for example, 8058 + ... + 15491.

It is an arithmetic number, because the mean of its divisors is an integer number (6123000).

Almost surely, 2^87531633 is an apocalyptic number.

It is an amenable number.

87531633 is a deficient number, since it is larger than the sum of its proper divisors (59420367).

87531633 is a wasteful number, since it uses less digits than its factorization.

87531633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23621 (or 23618 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 87531633 is about 9355.8341691161. The cubic root of 87531633 is about 444.0054936014.

The spelling of 87531633 in words is "eighty-seven million, five hundred thirty-one thousand, six hundred thirty-three".