91742523 has 16 divisors (see below), whose sum is σ = 131966496. Its totient is φ = 56476160.

The previous prime is 91742509. The next prime is 91742533. The reversal of 91742523 is 32524719.

It is a cyclic number.

It is not a de Polignac number, because 91742523 - 2⁸ = 91742267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91742533) 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, 14268 + ... + 19673.

It is an arithmetic number, because the mean of its divisors is an integer number (8247906).

Almost surely, 2^91742523 is an apocalyptic number.

91742523 is a deficient number, since it is larger than the sum of its proper divisors (40223973).

91742523 is a wasteful number, since it uses less digits than its factorization.

91742523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34014.

The product of its digits is 15120, while the sum is 33.

The square root of 91742523 is about 9578.2317261591. The cubic root of 91742523 is about 451.0142112162.

The spelling of 91742523 in words is "ninety-one million, seven hundred forty-two thousand, five hundred twenty-three".