86191669 has 4 divisors (see below), whose sum is σ = 86299020. Its totient is φ = 86084320.

The previous prime is 86191667. The next prime is 86191709. The reversal of 86191669 is 96619168.

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 37051569 + 49140100 = 6087^2 + 7010^2 .

It is a cyclic number.

It is not a de Polignac number, because 86191669 - 2¹ = 86191667 is a prime.

It is a super-2 number, since 2×86191669² = 14858007610011122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86191661) 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, 52462 + ... + 54079.

It is an arithmetic number, because the mean of its divisors is an integer number (21574755).

Almost surely, 2^86191669 is an apocalyptic number.

It is an amenable number.

86191669 is a deficient number, since it is larger than the sum of its proper divisors (107351).

86191669 is a wasteful number, since it uses less digits than its factorization.

86191669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107350.

The product of its digits is 139968, while the sum is 46.

The square root of 86191669 is about 9283.9468438806. The cubic root of 86191669 is about 441.7281707316.

The spelling of 86191669 in words is "eighty-six million, one hundred ninety-one thousand, six hundred sixty-nine".