91875573 has 8 divisors (see below), whose sum is σ = 136112000. Its totient is φ = 61250364.

The previous prime is 91875569. The next prime is 91875611. The reversal of 91875573 is 37557819.

91875573 is a `hidden beast` number, since 9 + 1 + 8 + 75 + 573 = 666.

It is not a de Polignac number, because 91875573 - 2² = 91875569 is a prime.

It is a super-2 number, since 2×91875573² = 16882241828156658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91875533) 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 7 ways as a sum of consecutive naturals, for example, 1701373 + ... + 1701426.

It is an arithmetic number, because the mean of its divisors is an integer number (17014000).

Almost surely, 2^91875573 is an apocalyptic number.

It is an amenable number.

91875573 is a deficient number, since it is larger than the sum of its proper divisors (44236427).

91875573 is a wasteful number, since it uses less digits than its factorization.

91875573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402808 (or 3402802 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 91875573 is about 9585.1746462962. The cubic root of 91875573 is about 451.2321343541.

The spelling of 91875573 in words is "ninety-one million, eight hundred seventy-five thousand, five hundred seventy-three".