87716161 has 4 divisors (see below), whose sum is σ = 94463572. Its totient is φ = 80968752.

The previous prime is 87716099. The next prime is 87716171. The reversal of 87716161 is 16161778.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46036225 + 41679936 = 6785^2 + 6456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87716161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87716161.

It is not an unprimeable number, because it can be changed into a prime (87716171) 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, 3373686 + ... + 3373711.

It is an arithmetic number, because the mean of its divisors is an integer number (23615893).

Almost surely, 2^87716161 is an apocalyptic number.

It is an amenable number.

87716161 is a deficient number, since it is larger than the sum of its proper divisors (6747411).

87716161 is a wasteful number, since it uses less digits than its factorization.

87716161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747410.

The product of its digits is 14112, while the sum is 37.

The square root of 87716161 is about 9365.6906312348. The cubic root of 87716161 is about 444.3172816039.

The spelling of 87716161 in words is "eighty-seven million, seven hundred sixteen thousand, one hundred sixty-one".