86641189 has 4 divisors (see below), whose sum is σ = 86691724. Its totient is φ = 86590656.

The previous prime is 86641169. The next prime is 86641193. The reversal of 86641189 is 98114668.

86641189 is nontrivially palindromic in base 16.

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 28622500 + 58018689 = 5350^2 + 7617^2 .

It is a cyclic number.

It is not a de Polignac number, because 86641189 - 2⁹ = 86640677 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 (86641169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22602 + ... + 26155.

It is an arithmetic number, because the mean of its divisors is an integer number (21672931).

Almost surely, 2^86641189 is an apocalyptic number.

It is an amenable number.

86641189 is a deficient number, since it is larger than the sum of its proper divisors (50535).

86641189 is a wasteful number, since it uses less digits than its factorization.

86641189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50534.

The product of its digits is 82944, while the sum is 43.

The square root of 86641189 is about 9308.1248917277. The cubic root of 86641189 is about 442.4947624052.

The spelling of 86641189 in words is "eighty-six million, six hundred forty-one thousand, one hundred eighty-nine".