91544641 has 8 divisors (see below), whose sum is σ = 96638400. Its totient is φ = 86478480.

The previous prime is 91544639. The next prime is 91544653. The reversal of 91544641 is 14644519.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91544641 - 2¹ = 91544639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91544597 and 91544606.

It is not an unprimeable number, because it can be changed into a prime (91544681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111 + ... + 13531.

It is an arithmetic number, because the mean of its divisors is an integer number (12079800).

Almost surely, 2^91544641 is an apocalyptic number.

It is an amenable number.

91544641 is a deficient number, since it is larger than the sum of its proper divisors (5093759).

91544641 is a wasteful number, since it uses less digits than its factorization.

91544641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13799.

The product of its digits is 17280, while the sum is 34.

The square root of 91544641 is about 9567.8963727666. The cubic root of 91544641 is about 450.6897094290.

The spelling of 91544641 in words is "ninety-one million, five hundred forty-four thousand, six hundred forty-one".