87681501 has 16 divisors (see below), whose sum is σ = 131241600. Its totient is φ = 57849984.

The previous prime is 87681487. The next prime is 87681571. The reversal of 87681501 is 10518678.

87681501 is a `hidden beast` number, since 8 + 76 + 81 + 501 = 666.

It is not a de Polignac number, because 87681501 - 2⁵ = 87681469 is a prime.

It is a super-2 number, since 2×87681501² = 15376091235226002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87681571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14121 + ... + 19358.

It is an arithmetic number, because the mean of its divisors is an integer number (8202600).

Almost surely, 2^87681501 is an apocalyptic number.

It is an amenable number.

87681501 is a deficient number, since it is larger than the sum of its proper divisors (43560099).

87681501 is a wasteful number, since it uses less digits than its factorization.

87681501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33585 (or 33579 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 87681501 is about 9363.8400776604. The cubic root of 87681501 is about 444.2587516605.

The spelling of 87681501 in words is "eighty-seven million, six hundred eighty-one thousand, five hundred one".