91057882 has 8 divisors (see below), whose sum is σ = 144621396. Its totient is φ = 42850752.

The previous prime is 91057859. The next prime is 91057909. The reversal of 91057882 is 28875019.

It can be written as a sum of positive squares in 2 ways, for example, as 87778161 + 3279721 = 9369^2 + 1811^2 .

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, 1339053 + ... + 1339120.

Almost surely, 2^91057882 is an apocalyptic number.

91057882 is a deficient number, since it is larger than the sum of its proper divisors (53563514).

91057882 is a wasteful number, since it uses less digits than its factorization.

91057882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678192.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 91057882 is about 9542.4253730380. The cubic root of 91057882 is about 449.8894905592.

The spelling of 91057882 in words is "ninety-one million, fifty-seven thousand, eight hundred eighty-two".