91444445 has 32 divisors (see below), whose sum is σ = 120434688. Its totient is φ = 66382848.

The previous prime is 91444439. The next prime is 91444489. The reversal of 91444445 is 54444419.

It is a cyclic number.

It is not a de Polignac number, because 91444445 - 2⁸ = 91444189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 464087 + ... + 464283.

It is an arithmetic number, because the mean of its divisors is an integer number (3763584).

Almost surely, 2^91444445 is an apocalyptic number.

It is an amenable number.

91444445 is a deficient number, since it is larger than the sum of its proper divisors (28990243).

91444445 is a wasteful number, since it uses less digits than its factorization.

91444445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 46080, while the sum is 35.

The square root of 91444445 is about 9562.6588875689. The cubic root of 91444445 is about 450.5252221340.

The spelling of 91444445 in words is "ninety-one million, four hundred forty-four thousand, four hundred forty-five".