87716687 has 4 divisors (see below), whose sum is σ = 91530480. Its totient is φ = 83902896.

The previous prime is 87716669. The next prime is 87716729. The reversal of 87716687 is 78661778.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-87716687 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 (87716647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906862 + ... + 1906907.

It is an arithmetic number, because the mean of its divisors is an integer number (22882620).

Almost surely, 2^87716687 is an apocalyptic number.

87716687 is a deficient number, since it is larger than the sum of its proper divisors (3813793).

87716687 is a wasteful number, since it uses less digits than its factorization.

87716687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813792.

The product of its digits is 790272, while the sum is 50.

The square root of 87716687 is about 9365.7187124107. The cubic root of 87716687 is about 444.3181697353.

The spelling of 87716687 in words is "eighty-seven million, seven hundred sixteen thousand, six hundred eighty-seven".