86856493 has 8 divisors (see below), whose sum is σ = 87913728. Its totient is φ = 85805664.

The previous prime is 86856481. The next prime is 86856521. The reversal of 86856493 is 39465868.

It is a happy number.

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 86856493 - 2²⁵ = 53302061 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 (86856403) 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, 29130 + ... + 31972.

It is an arithmetic number, because the mean of its divisors is an integer number (10989216).

Almost surely, 2^86856493 is an apocalyptic number.

It is an amenable number.

86856493 is a deficient number, since it is larger than the sum of its proper divisors (1057235).

86856493 is a wasteful number, since it uses less digits than its factorization.

86856493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203.

The product of its digits is 1244160, while the sum is 49.

The square root of 86856493 is about 9319.6830954706. The cubic root of 86856493 is about 442.8609934703.

The spelling of 86856493 in words is "eighty-six million, eight hundred fifty-six thousand, four hundred ninety-three".