91875445 has 4 divisors (see below), whose sum is σ = 110250540. Its totient is φ = 73500352.

The previous prime is 91875389. The next prime is 91875457. The reversal of 91875445 is 54457819.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44182609 + 47692836 = 6647^2 + 6906^2 .

It is a cyclic number.

It is not a de Polignac number, because 91875445 - 2⁹ = 91874933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9187540 + ... + 9187549.

It is an arithmetic number, because the mean of its divisors is an integer number (27562635).

Almost surely, 2^91875445 is an apocalyptic number.

It is an amenable number.

91875445 is a deficient number, since it is larger than the sum of its proper divisors (18375095).

91875445 is a wasteful number, since it uses less digits than its factorization.

91875445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18375094.

The product of its digits is 201600, while the sum is 43.

The square root of 91875445 is about 9585.1679693159. The cubic root of 91875445 is about 451.2319248035.

The spelling of 91875445 in words is "ninety-one million, eight hundred seventy-five thousand, four hundred forty-five".