91129033 has 2 divisors, whose sum is σ = 91129034. Its totient is φ = 91129032.

The previous prime is 91129021. The next prime is 91129067. The reversal of 91129033 is 33092119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86918329 + 4210704 = 9323^2 + 2052^2 .

It is a cyclic number.

It is not a de Polignac number, because 91129033 - 2²¹ = 89031881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91128992 and 91129010.

It is not a weakly prime, because it can be changed into another prime (91129433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45564516 + 45564517.

It is an arithmetic number, because the mean of its divisors is an integer number (45564517).

Almost surely, 2^91129033 is an apocalyptic number.

It is an amenable number.

91129033 is a deficient number, since it is larger than the sum of its proper divisors (1).

91129033 is an equidigital number, since it uses as much as digits as its factorization.

91129033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 91129033 is about 9546.1527852848. The cubic root of 91129033 is about 450.0066385852.

It can be divided in two parts, 9112 and 9033, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 91129033 in words is "ninety-one million, one hundred twenty-nine thousand, thirty-three".