91125143 has 4 divisors (see below), whose sum is σ = 91597488. Its totient is φ = 90652800.

The previous prime is 91125131. The next prime is 91125169. The reversal of 91125143 is 34152119.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91125143 - 2⁶ = 91125079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91125113) 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 3 ways as a sum of consecutive naturals, for example, 235883 + ... + 236268.

It is an arithmetic number, because the mean of its divisors is an integer number (22899372).

Almost surely, 2^91125143 is an apocalyptic number.

91125143 is a deficient number, since it is larger than the sum of its proper divisors (472345).

91125143 is a wasteful number, since it uses less digits than its factorization.

91125143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472344.

The product of its digits is 1080, while the sum is 26.

The square root of 91125143 is about 9545.9490361095. The cubic root of 91125143 is about 450.0002353908. Note that the first 3 decimals are identical.

The spelling of 91125143 in words is "ninety-one million, one hundred twenty-five thousand, one hundred forty-three".