91068111 has 16 divisors (see below), whose sum is σ = 139269120. Its totient is φ = 58753080.

The previous prime is 91068101. The next prime is 91068143. The reversal of 91068111 is 11186019.

It is not a de Polignac number, because 91068111 - 2⁷ = 91067983 is a prime.

It is a super-2 number, since 2×91068111² = 16586801682216642, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91068101) by changing a digit.

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, 53565 + ... + 55238.

It is an arithmetic number, because the mean of its divisors is an integer number (8704320).

Almost surely, 2^91068111 is an apocalyptic number.

91068111 is a deficient number, since it is larger than the sum of its proper divisors (48201009).

91068111 is a wasteful number, since it uses less digits than its factorization.

91068111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108843 (or 108837 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 91068111 is about 9542.9613328358. The cubic root of 91068111 is about 449.9063360615.

The spelling of 91068111 in words is "ninety-one million, sixty-eight thousand, one hundred eleven".