91909441 has 16 divisors (see below), whose sum is σ = 104977600. Its totient is φ = 79766208.

The previous prime is 91909427. The next prime is 91909453. The reversal of 91909441 is 14490919.

It is a cyclic number.

It is not a de Polignac number, because 91909441 - 2¹¹ = 91907393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91909441.

It is not an unprimeable number, because it can be changed into a prime (91909421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32995 + ... + 35671.

It is an arithmetic number, because the mean of its divisors is an integer number (6561100).

Almost surely, 2^91909441 is an apocalyptic number.

It is an amenable number.

91909441 is a deficient number, since it is larger than the sum of its proper divisors (13068159).

91909441 is a wasteful number, since it uses less digits than its factorization.

91909441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 91909441 is about 9586.9411701543. The cubic root of 91909441 is about 451.2875732917.

The spelling of 91909441 in words is "ninety-one million, nine hundred nine thousand, four hundred forty-one".