91013441 has 4 divisors (see below), whose sum is σ = 91243092. Its totient is φ = 90783792.

The previous prime is 91013411. The next prime is 91013443. The reversal of 91013441 is 14431019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14431019 = 283 ⋅50993.

It can be written as a sum of positive squares in 2 ways, for example, as 65044225 + 25969216 = 8065^2 + 5096^2 .

It is a cyclic number.

It is not a de Polignac number, because 91013441 - 2¹⁰ = 91012417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91013443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114230 + ... + 115023.

It is an arithmetic number, because the mean of its divisors is an integer number (22810773).

Almost surely, 2^91013441 is an apocalyptic number.

It is an amenable number.

91013441 is a deficient number, since it is larger than the sum of its proper divisors (229651).

91013441 is a wasteful number, since it uses less digits than its factorization.

91013441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229650.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 91013441 is about 9540.0964879817. The cubic root of 91013441 is about 449.8162887966.

The spelling of 91013441 in words is "ninety-one million, thirteen thousand, four hundred forty-one".