91043441 has 8 divisors (see below), whose sum is σ = 94429800. Its totient is φ = 87673600.

The previous prime is 91043437. The next prime is 91043443. The reversal of 91043441 is 14434019.

It can be written as a sum of positive squares in 4 ways, for example, as 24049216 + 66994225 = 4904^2 + 8185^2 .

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 91043441 - 2² = 91043437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91043441.

It is not an unprimeable number, because it can be changed into a prime (91043443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7715 + ... + 15543.

It is an arithmetic number, because the mean of its divisors is an integer number (11803725).

Almost surely, 2^91043441 is an apocalyptic number.

It is an amenable number.

91043441 is a deficient number, since it is larger than the sum of its proper divisors (3386359).

91043441 is a wasteful number, since it uses less digits than its factorization.

91043441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8259.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 91043441 is about 9541.6686695777. The cubic root of 91043441 is about 449.8657064288.

The spelling of 91043441 in words is "ninety-one million, forty-three thousand, four hundred forty-one".