91444463 has 4 divisors (see below), whose sum is σ = 99757608. Its totient is φ = 83131320.

The previous prime is 91444439. The next prime is 91444489. The reversal of 91444463 is 36444419.

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 91444463 - 2¹⁰ = 91443439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91444403) 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, 4156556 + ... + 4156577.

It is an arithmetic number, because the mean of its divisors is an integer number (24939402).

Almost surely, 2^91444463 is an apocalyptic number.

91444463 is a deficient number, since it is larger than the sum of its proper divisors (8313145).

91444463 is a wasteful number, since it uses less digits than its factorization.

91444463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313144.

The product of its digits is 41472, while the sum is 35.

The square root of 91444463 is about 9562.6598287297. The cubic root of 91444463 is about 450.5252516946.

The spelling of 91444463 in words is "ninety-one million, four hundred forty-four thousand, four hundred sixty-three".