91544011 has 4 divisors (see below), whose sum is σ = 98585872. Its totient is φ = 84502152.

The previous prime is 91544009. The next prime is 91544017. The reversal of 91544011 is 11044519.

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 91544011 - 2¹ = 91544009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91544017) 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, 3520911 + ... + 3520936.

It is an arithmetic number, because the mean of its divisors is an integer number (24646468).

Almost surely, 2^91544011 is an apocalyptic number.

91544011 is a deficient number, since it is larger than the sum of its proper divisors (7041861).

91544011 is a wasteful number, since it uses less digits than its factorization.

91544011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7041860.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 91544011 is about 9567.8634501126. The cubic root of 91544011 is about 450.6886755612.

The spelling of 91544011 in words is "ninety-one million, five hundred forty-four thousand, eleven".