86021687 has 8 divisors (see below), whose sum is σ = 87165072. Its totient is φ = 84884800.

The previous prime is 86021669. The next prime is 86021693. The reversal of 86021687 is 78612068.

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

It is a cyclic number.

It is not a de Polignac number, because 86021687 - 2⁶ = 86021623 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 86021687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86021657) 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, 28637 + ... + 31497.

It is an arithmetic number, because the mean of its divisors is an integer number (10895634).

Almost surely, 2^86021687 is an apocalyptic number.

86021687 is a deficient number, since it is larger than the sum of its proper divisors (1143385).

86021687 is a wasteful number, since it uses less digits than its factorization.

86021687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 86021687 is about 9274.7877064653. The cubic root of 86021687 is about 441.4375964303.

The spelling of 86021687 in words is "eighty-six million, twenty-one thousand, six hundred eighty-seven".