91303133 has 2 divisors, whose sum is σ = 91303134. Its totient is φ = 91303132.

The previous prime is 91303117. The next prime is 91303139. The reversal of 91303133 is 33130319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69522244 + 21780889 = 8338^2 + 4667^2 .

It is a cyclic number.

It is not a de Polignac number, because 91303133 - 2⁴ = 91303117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91303099 and 91303108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91303139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45651566 + 45651567.

It is an arithmetic number, because the mean of its divisors is an integer number (45651567).

Almost surely, 2^91303133 is an apocalyptic number.

It is an amenable number.

91303133 is a deficient number, since it is larger than the sum of its proper divisors (1).

91303133 is an equidigital number, since it uses as much as digits as its factorization.

91303133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 91303133 is about 9555.2672908716. The cubic root of 91303133 is about 450.2930321864.

The spelling of 91303133 in words is "ninety-one million, three hundred three thousand, one hundred thirty-three".