91444443 has 4 divisors (see below), whose sum is σ = 121925928. Its totient is φ = 60962960.

The previous prime is 91444439. The next prime is 91444489. The reversal of 91444443 is 34444419.

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 91444443 - 2² = 91444439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91444403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15240738 + ... + 15240743.

It is an arithmetic number, because the mean of its divisors is an integer number (30481482).

Almost surely, 2^91444443 is an apocalyptic number.

91444443 is a deficient number, since it is larger than the sum of its proper divisors (30481485).

91444443 is a wasteful number, since it uses less digits than its factorization.

91444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30481484.

The product of its digits is 27648, while the sum is 33.

The square root of 91444443 is about 9562.6587829954. The cubic root of 91444443 is about 450.5252188495.

The spelling of 91444443 in words is "ninety-one million, four hundred forty-four thousand, four hundred forty-three".