86187473 has 4 divisors (see below), whose sum is σ = 86950308. Its totient is φ = 85424640.

The previous prime is 86187469. The next prime is 86187481. The reversal of 86187473 is 37478168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25472209 + 60715264 = 5047^2 + 7792^2 .

It is a cyclic number.

It is not a de Polignac number, because 86187473 - 2² = 86187469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86187373) 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, 381248 + ... + 381473.

It is an arithmetic number, because the mean of its divisors is an integer number (21737577).

Almost surely, 2^86187473 is an apocalyptic number.

It is an amenable number.

86187473 is a deficient number, since it is larger than the sum of its proper divisors (762835).

86187473 is a wasteful number, since it uses less digits than its factorization.

86187473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762834.

The product of its digits is 225792, while the sum is 44.

The square root of 86187473 is about 9283.7208596554. The cubic root of 86187473 is about 441.7210025157.

The spelling of 86187473 in words is "eighty-six million, one hundred eighty-seven thousand, four hundred seventy-three".