86191889 has 8 divisors (see below), whose sum is σ = 98890368. Its totient is φ = 73589760.

The previous prime is 86191883. The next prime is 86191913. The reversal of 86191889 is 98819168.

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 86191889 - 2¹² = 86187793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86191883) 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, 22157 + ... + 25754.

It is an arithmetic number, because the mean of its divisors is an integer number (12361296).

Almost surely, 2^86191889 is an apocalyptic number.

It is an amenable number.

86191889 is a deficient number, since it is larger than the sum of its proper divisors (12698479).

86191889 is a wasteful number, since it uses less digits than its factorization.

86191889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48175.

The product of its digits is 248832, while the sum is 50.

The square root of 86191889 is about 9283.9586922821. The cubic root of 86191889 is about 441.7285465611.

The spelling of 86191889 in words is "eighty-six million, one hundred ninety-one thousand, eight hundred eighty-nine".