86787685 has 4 divisors (see below), whose sum is σ = 104145228. Its totient is φ = 69430144.

The previous prime is 86787683. The next prime is 86787731. The reversal of 86787685 is 58678768.

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 63138916 + 23648769 = 7946^2 + 4863^2 .

It is a cyclic number.

It is not a de Polignac number, because 86787685 - 2¹ = 86787683 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 (86787683) 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, 8678764 + ... + 8678773.

It is an arithmetic number, because the mean of its divisors is an integer number (26036307).

Almost surely, 2^86787685 is an apocalyptic number.

It is an amenable number.

86787685 is a deficient number, since it is larger than the sum of its proper divisors (17357543).

86787685 is a wasteful number, since it uses less digits than its factorization.

86787685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357542.

The product of its digits is 4515840, while the sum is 55.

The square root of 86787685 is about 9315.9908222368. The cubic root of 86787685 is about 442.7440172624.

The spelling of 86787685 in words is "eighty-six million, seven hundred eighty-seven thousand, six hundred eighty-five".