91741813 has 2 divisors, whose sum is σ = 91741814. Its totient is φ = 91741812.

The previous prime is 91741787. The next prime is 91741817. The reversal of 91741813 is 31814719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74252689 + 17489124 = 8617^2 + 4182^2 .

It is a cyclic number.

It is not a de Polignac number, because 91741813 - 2¹⁷ = 91610741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91741817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45870906 + 45870907.

It is an arithmetic number, because the mean of its divisors is an integer number (45870907).

Almost surely, 2^91741813 is an apocalyptic number.

It is an amenable number.

91741813 is a deficient number, since it is larger than the sum of its proper divisors (1).

91741813 is an equidigital number, since it uses as much as digits as its factorization.

91741813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 91741813 is about 9578.1946628788. The cubic root of 91741813 is about 451.0130477393.

The spelling of 91741813 in words is "ninety-one million, seven hundred forty-one thousand, eight hundred thirteen".