86689887 has 8 divisors (see below), whose sum is σ = 115637040. Its totient is φ = 57768000.

The previous prime is 86689831. The next prime is 86689891. The reversal of 86689887 is 78898668.

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

It is a de Polignac number, because none of the positive numbers 2^k-86689887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86689887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86689087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4189 + ... + 13817.

It is an arithmetic number, because the mean of its divisors is an integer number (14454630).

Almost surely, 2^86689887 is an apocalyptic number.

86689887 is a deficient number, since it is larger than the sum of its proper divisors (28947153).

86689887 is a wasteful number, since it uses less digits than its factorization.

86689887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633.

The product of its digits is 9289728, while the sum is 60.

The square root of 86689887 is about 9310.7404109448. The cubic root of 86689887 is about 442.5776505180.

The spelling of 86689887 in words is "eighty-six million, six hundred eighty-nine thousand, eight hundred eighty-seven".