91881106 has 8 divisors (see below), whose sum is σ = 142574220. Its totient is φ = 44356368.

The previous prime is 91881079. The next prime is 91881121. The reversal of 91881106 is 60118819.

It can be written as a sum of positive squares in 2 ways, for example, as 83557881 + 8323225 = 9141^2 + 2885^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 792021 + ... + 792136.

Almost surely, 2^91881106 is an apocalyptic number.

91881106 is a deficient number, since it is larger than the sum of its proper divisors (50693114).

91881106 is a wasteful number, since it uses less digits than its factorization.

91881106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584188.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 91881106 is about 9585.4632647567. The cubic root of 91881106 is about 451.2411923195.

The spelling of 91881106 in words is "ninety-one million, eight hundred eighty-one thousand, one hundred six".