86219791 has 8 divisors (see below), whose sum is σ = 99409824. Its totient is φ = 73248000.

The previous prime is 86219759. The next prime is 86219797. The reversal of 86219791 is 19791268.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86219791 - 2⁵ = 86219759 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 (86219797) 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 7 ways as a sum of consecutive naturals, for example, 53710 + ... + 55291.

It is an arithmetic number, because the mean of its divisors is an integer number (12426228).

Almost surely, 2^86219791 is an apocalyptic number.

86219791 is a deficient number, since it is larger than the sum of its proper divisors (13190033).

86219791 is a wasteful number, since it uses less digits than its factorization.

86219791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109121.

The product of its digits is 54432, while the sum is 43.

The square root of 86219791 is about 9285.4612701793. The cubic root of 86219791 is about 441.7762068082.

It can be divided in two parts, 86 and 219791, that multiplied together give a triangular number (18902026 = T₆₁₄₈).

The spelling of 86219791 in words is "eighty-six million, two hundred nineteen thousand, seven hundred ninety-one".