91100143 has 2 divisors, whose sum is σ = 91100144. Its totient is φ = 91100142.

The previous prime is 91100111. The next prime is 91100153. The reversal of 91100143 is 34100119.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91100143 - 2⁵ = 91100111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91100143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91100153) 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 as a sum of consecutive naturals, namely, 45550071 + 45550072.

It is an arithmetic number, because the mean of its divisors is an integer number (45550072).

Almost surely, 2^91100143 is an apocalyptic number.

91100143 is a deficient number, since it is larger than the sum of its proper divisors (1).

91100143 is an equidigital number, since it uses as much as digits as its factorization.

91100143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 91100143 is about 9544.6394903108. The cubic root of 91100143 is about 449.9590794066.

The spelling of 91100143 in words is "ninety-one million, one hundred thousand, one hundred forty-three".