91800074 has 4 divisors (see below), whose sum is σ = 137700114. Its totient is φ = 45900036.

The previous prime is 91800053. The next prime is 91800101. The reversal of 91800074 is 47000819.

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

It can be written as a sum of positive squares in only one way, i.e., 71487025 + 20313049 = 8455^2 + 4507^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22950017 + ... + 22950020.

Almost surely, 2^91800074 is an apocalyptic number.

91800074 is a deficient number, since it is larger than the sum of its proper divisors (45900040).

91800074 is a wasteful number, since it uses less digits than its factorization.

91800074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45900039.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 91800074 is about 9581.2355153185. The cubic root of 91800074 is about 451.1085000743.

The spelling of 91800074 in words is "ninety-one million, eight hundred thousand, seventy-four".