86616787 has 4 divisors (see below), whose sum is σ = 88251120. Its totient is φ = 84982456.

The previous prime is 86616773. The next prime is 86616791. The reversal of 86616787 is 78761668.

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

It is a cyclic number.

It is not a de Polignac number, because 86616787 - 2⁷ = 86616659 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 86616787.

It is not an unprimeable number, because it can be changed into a prime (86616727) 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, 817087 + ... + 817192.

It is an arithmetic number, because the mean of its divisors is an integer number (22062780).

Almost surely, 2^86616787 is an apocalyptic number.

86616787 is a deficient number, since it is larger than the sum of its proper divisors (1634333).

86616787 is a wasteful number, since it uses less digits than its factorization.

86616787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634332.

The product of its digits is 677376, while the sum is 49.

The square root of 86616787 is about 9306.8140091011. The cubic root of 86616787 is about 442.4532164569.

The spelling of 86616787 in words is "eighty-six million, six hundred sixteen thousand, seven hundred eighty-seven".