87116813 has 8 divisors (see below), whose sum is σ = 100926528. Its totient is φ = 73648224.

The previous prime is 87116791. The next prime is 87116879. The reversal of 87116813 is 31861178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87116813 - 2¹⁶ = 87051277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87116413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84731 + ... + 85752.

It is an arithmetic number, because the mean of its divisors is an integer number (12615816).

Almost surely, 2^87116813 is an apocalyptic number.

It is an amenable number.

87116813 is a deficient number, since it is larger than the sum of its proper divisors (13809715).

87116813 is a wasteful number, since it uses less digits than its factorization.

87116813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170563.

The product of its digits is 8064, while the sum is 35.

The square root of 87116813 is about 9333.6387866684. The cubic root of 87116813 is about 443.3029891732.

The spelling of 87116813 in words is "eighty-seven million, one hundred sixteen thousand, eight hundred thirteen".