87531634 has 12 divisors (see below), whose sum is σ = 132919326. Its totient is φ = 43231712.

The previous prime is 87531611. The next prime is 87531649. The reversal of 87531634 is 43613578.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 11580409 = 8715^2 + 3403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87531593 and 87531602.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 10602 + ... + 16954.

Almost surely, 2^87531634 is an apocalyptic number.

87531634 is a deficient number, since it is larger than the sum of its proper divisors (45387692).

87531634 is an equidigital number, since it uses as much as digits as its factorization.

87531634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6521 (or 6438 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 87531634 is about 9355.8342225587. The cubic root of 87531634 is about 444.0054952922.

The spelling of 87531634 in words is "eighty-seven million, five hundred thirty-one thousand, six hundred thirty-four".