86081687 has 4 divisors (see below), whose sum is σ = 86630136. Its totient is φ = 85533240.

The previous prime is 86081669. The next prime is 86081713. The reversal of 86081687 is 78618068.

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 86081687 - 2⁶ = 86081623 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 (86081087) 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, 273989 + ... + 274302.

It is an arithmetic number, because the mean of its divisors is an integer number (21657534).

Almost surely, 2^86081687 is an apocalyptic number.

86081687 is a deficient number, since it is larger than the sum of its proper divisors (548449).

86081687 is a wasteful number, since it uses less digits than its factorization.

86081687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548448.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 86081687 is about 9278.0217180173. The cubic root of 86081687 is about 441.5402066017.

It can be divided in two parts, 86081 and 687, that added together give a palindrome (86768).

The spelling of 86081687 in words is "eighty-six million, eighty-one thousand, six hundred eighty-seven".