86191982 has 4 divisors (see below), whose sum is σ = 129287976. Its totient is φ = 43095990.

The previous prime is 86191933. The next prime is 86191991. The reversal of 86191982 is 28919168.

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

It is a super-2 number, since 2×86191982² = 14858115522176648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21547994 + ... + 21547997.

It is an arithmetic number, because the mean of its divisors is an integer number (32321994).

Almost surely, 2^86191982 is an apocalyptic number.

86191982 is a deficient number, since it is larger than the sum of its proper divisors (43095994).

86191982 is a wasteful number, since it uses less digits than its factorization.

86191982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43095993.

The product of its digits is 62208, while the sum is 44.

The square root of 86191982 is about 9283.9637009200. The cubic root of 86191982 is about 441.7287054343.

It can be divided in two parts, 8619 and 1982, that added together give a palindrome (10601).

The spelling of 86191982 in words is "eighty-six million, one hundred ninety-one thousand, nine hundred eighty-two".