86471917 has 6 divisors (see below), whose sum is σ = 100589838. Its totient is φ = 74118744.

The previous prime is 86471909. The next prime is 86471969. The reversal of 86471917 is 71917468.

It can be written as a sum of positive squares in only one way, i.e., 66275881 + 20196036 = 8141^2 + 4494^2 .

It is not a de Polignac number, because 86471917 - 2³ = 86471909 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 (86471017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 882318 + ... + 882415.

It is an arithmetic number, because the mean of its divisors is an integer number (16764973).

Almost surely, 2^86471917 is an apocalyptic number.

It is an amenable number.

86471917 is a deficient number, since it is larger than the sum of its proper divisors (14117921).

86471917 is a wasteful number, since it uses less digits than its factorization.

86471917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764747 (or 1764740 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 86471917 is about 9299.0277448774. The cubic root of 86471917 is about 442.2064053074.

The spelling of 86471917 in words is "eighty-six million, four hundred seventy-one thousand, nine hundred seventeen".