91844441 has 4 divisors (see below), whose sum is σ = 98909412. Its totient is φ = 84779472.

The previous prime is 91844437. The next prime is 91844503. The reversal of 91844441 is 14444819.

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 17884441 + 73960000 = 4229^2 + 8600^2 .

It is a cyclic number.

It is not a de Polignac number, because 91844441 - 2² = 91844437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91844411) 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 3 ways as a sum of consecutive naturals, for example, 3532466 + ... + 3532491.

It is an arithmetic number, because the mean of its divisors is an integer number (24727353).

Almost surely, 2^91844441 is an apocalyptic number.

It is an amenable number.

91844441 is a deficient number, since it is larger than the sum of its proper divisors (7064971).

91844441 is a wasteful number, since it uses less digits than its factorization.

91844441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064970.

The product of its digits is 18432, while the sum is 35.

The square root of 91844441 is about 9583.5505424660. The cubic root of 91844441 is about 451.1811619888.

The spelling of 91844441 in words is "ninety-one million, eight hundred forty-four thousand, four hundred forty-one".