87681583 has 16 divisors (see below), whose sum is σ = 97984800. Its totient is φ = 77788800.

The previous prime is 87681571. The next prime is 87681613. The reversal of 87681583 is 38518678.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87681583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87681383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99541 + ... + 100417.

It is an arithmetic number, because the mean of its divisors is an integer number (6124050).

Almost surely, 2^87681583 is an apocalyptic number.

87681583 is a deficient number, since it is larger than the sum of its proper divisors (10303217).

87681583 is a wasteful number, since it uses less digits than its factorization.

87681583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098.

The product of its digits is 322560, while the sum is 46.

The square root of 87681583 is about 9363.8444562049. The cubic root of 87681583 is about 444.2588901512.

The spelling of 87681583 in words is "eighty-seven million, six hundred eighty-one thousand, five hundred eighty-three".