87816501 has 8 divisors (see below), whose sum is σ = 130098560. Its totient is φ = 58544316.

The previous prime is 87816473. The next prime is 87816517. The reversal of 87816501 is 10561878.

It is not a de Polignac number, because 87816501 - 2⁹ = 87815989 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87816551) 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 7 ways as a sum of consecutive naturals, for example, 1626205 + ... + 1626258.

It is an arithmetic number, because the mean of its divisors is an integer number (16262320).

Almost surely, 2^87816501 is an apocalyptic number.

It is an amenable number.

87816501 is a deficient number, since it is larger than the sum of its proper divisors (42282059).

87816501 is a wasteful number, since it uses less digits than its factorization.

87816501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252472 (or 3252466 counting only the distinct ones).

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

The square root of 87816501 is about 9371.0458861325. The cubic root of 87816501 is about 444.4866377281.

The spelling of 87816501 in words is "eighty-seven million, eight hundred sixteen thousand, five hundred one".