91194143 has 2 divisors, whose sum is σ = 91194144. Its totient is φ = 91194142.

The previous prime is 91194139. The next prime is 91194193. The reversal of 91194143 is 34149119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91194143 - 2² = 91194139 is a prime.

It is equal to p_5282258 and since 91194143 and 5282258 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91194133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45597071 + 45597072.

It is an arithmetic number, because the mean of its divisors is an integer number (45597072).

Almost surely, 2^91194143 is an apocalyptic number.

91194143 is a deficient number, since it is larger than the sum of its proper divisors (1).

91194143 is an equidigital number, since it uses as much as digits as its factorization.

91194143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 91194143 is about 9549.5624507095. The cubic root of 91194143 is about 450.1137868633.

The spelling of 91194143 in words is "ninety-one million, one hundred ninety-four thousand, one hundred forty-three".