86779471 has 4 divisors (see below), whose sum is σ = 86814000. Its totient is φ = 86744944.

The previous prime is 86779463. The next prime is 86779477. The reversal of 86779471 is 17497768.

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 86779471 - 2³ = 86779463 is a prime.

It is a super-3 number, since 3×86779471³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86779477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13171 + ... + 18628.

It is an arithmetic number, because the mean of its divisors is an integer number (21703500).

Almost surely, 2^86779471 is an apocalyptic number.

86779471 is a deficient number, since it is larger than the sum of its proper divisors (34529).

86779471 is a wasteful number, since it uses less digits than its factorization.

86779471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34528.

The product of its digits is 592704, while the sum is 49.

The square root of 86779471 is about 9315.5499569269. The cubic root of 86779471 is about 442.7300490206.

The spelling of 86779471 in words is "eighty-six million, seven hundred seventy-nine thousand, four hundred seventy-one".