91091041 has 2 divisors, whose sum is σ = 91091042. Its totient is φ = 91091040.

The previous prime is 91091023. The next prime is 91091081. The reversal of 91091041 is 14019019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82882816 + 8208225 = 9104^2 + 2865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91091041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91090997 and 91091015.

It is not a weakly prime, because it can be changed into another prime (91091081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45545520 + 45545521.

It is an arithmetic number, because the mean of its divisors is an integer number (45545521).

Almost surely, 2^91091041 is an apocalyptic number.

It is an amenable number.

91091041 is a deficient number, since it is larger than the sum of its proper divisors (1).

91091041 is an equidigital number, since it uses as much as digits as its factorization.

91091041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 91091041 is about 9544.1626662584. The cubic root of 91091041 is about 449.9440934662.

The spelling of 91091041 in words is "ninety-one million, ninety-one thousand, forty-one".