91961833 has 2 divisors, whose sum is σ = 91961834. Its totient is φ = 91961832.

The previous prime is 91961819. The next prime is 91961851. The reversal of 91961833 is 33816919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71774784 + 20187049 = 8472^2 + 4493^2 .

It is an emirp because it is prime and its reverse (33816919) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91961833 is a prime.

It is a super-3 number, since 3×91961833³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (91961873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45980916 + 45980917.

It is an arithmetic number, because the mean of its divisors is an integer number (45980917).

Almost surely, 2^91961833 is an apocalyptic number.

It is an amenable number.

91961833 is a deficient number, since it is larger than the sum of its proper divisors (1).

91961833 is an equidigital number, since it uses as much as digits as its factorization.

91961833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 91961833 is about 9589.6732478224. The cubic root of 91961833 is about 451.3733075647.

The spelling of 91961833 in words is "ninety-one million, nine hundred sixty-one thousand, eight hundred thirty-three".