91856842 has 32 divisors (see below), whose sum is σ = 173481984. Its totient is φ = 35434800.

The previous prime is 91856837. The next prime is 91856873. The reversal of 91856842 is 24865819.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12967 + ... + 18757.

It is an arithmetic number, because the mean of its divisors is an integer number (5421312).

Almost surely, 2^91856842 is an apocalyptic number.

91856842 is a deficient number, since it is larger than the sum of its proper divisors (81625142).

91856842 is a wasteful number, since it uses less digits than its factorization.

91856842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5914.

The product of its digits is 138240, while the sum is 43.

The square root of 91856842 is about 9584.1975146592. The cubic root of 91856842 is about 451.2014675029.

The spelling of 91856842 in words is "ninety-one million, eight hundred fifty-six thousand, eight hundred forty-two".