86819645 has 32 divisors (see below), whose sum is σ = 120476160. Its totient is φ = 59400000.

The previous prime is 86819617. The next prime is 86819647. The reversal of 86819645 is 54691868.

It is not a de Polignac number, because 86819645 - 2²² = 82625341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86819645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86819647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262130 + ... + 262460.

It is an arithmetic number, because the mean of its divisors is an integer number (3764880).

Almost surely, 2^86819645 is an apocalyptic number.

It is an amenable number.

86819645 is a deficient number, since it is larger than the sum of its proper divisors (33656515).

86819645 is a wasteful number, since it uses less digits than its factorization.

86819645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 414720, while the sum is 47.

The square root of 86819645 is about 9317.7059945032. The cubic root of 86819645 is about 442.7983581603.

The spelling of 86819645 in words is "eighty-six million, eight hundred nineteen thousand, six hundred forty-five".