91038841 has 2 divisors, whose sum is σ = 91038842. Its totient is φ = 91038840.

The previous prime is 91038839. The next prime is 91038887. The reversal of 91038841 is 14883019.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84713616 + 6325225 = 9204^2 + 2515^2 .

It is an emirp because it is prime and its reverse (14883019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91038841 - 2¹ = 91038839 is a prime.

Together with 91038839, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 91038797 and 91038806.

It is not a weakly prime, because it can be changed into another prime (91038821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45519420 + 45519421.

It is an arithmetic number, because the mean of its divisors is an integer number (45519421).

Almost surely, 2^91038841 is an apocalyptic number.

It is an amenable number.

91038841 is a deficient number, since it is larger than the sum of its proper divisors (1).

91038841 is an equidigital number, since it uses as much as digits as its factorization.

91038841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 91038841 is about 9541.4276185485. The cubic root of 91038841 is about 449.8581297633.

The spelling of 91038841 in words is "ninety-one million, thirty-eight thousand, eight hundred forty-one".