86191679 has 4 divisors (see below), whose sum is σ = 98504784. Its totient is φ = 73878576.

The previous prime is 86191667. The next prime is 86191709. The reversal of 86191679 is 97619168.

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

It is a cyclic number.

It is not a de Polignac number, because 86191679 - 2⁴ = 86191663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86194679) 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, 6156542 + ... + 6156555.

It is an arithmetic number, because the mean of its divisors is an integer number (24626196).

Almost surely, 2^86191679 is an apocalyptic number.

86191679 is a deficient number, since it is larger than the sum of its proper divisors (12313105).

86191679 is a wasteful number, since it uses less digits than its factorization.

86191679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12313104.

The product of its digits is 163296, while the sum is 47.

The square root of 86191679 is about 9283.9473824446. The cubic root of 86191679 is about 441.7281878148.

The spelling of 86191679 in words is "eighty-six million, one hundred ninety-one thousand, six hundred seventy-nine".