91498073 has 2 divisors, whose sum is σ = 91498074. Its totient is φ = 91498072.

The previous prime is 91498067. The next prime is 91498079. The reversal of 91498073 is 37089419.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (91498067) and next prime (91498079).

It can be written as a sum of positive squares in only one way, i.e., 77933584 + 13564489 = 8828^2 + 3683^2 .

It is an emirp because it is prime and its reverse (37089419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91498073 - 2⁶ = 91498009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91498073.

It is not a weakly prime, because it can be changed into another prime (91498079) 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, 45749036 + 45749037.

It is an arithmetic number, because the mean of its divisors is an integer number (45749037).

Almost surely, 2^91498073 is an apocalyptic number.

It is an amenable number.

91498073 is a deficient number, since it is larger than the sum of its proper divisors (1).

91498073 is an equidigital number, since it uses as much as digits as its factorization.

91498073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 91498073 is about 9565.4625084206. The cubic root of 91498073 is about 450.6132757608.

The spelling of 91498073 in words is "ninety-one million, four hundred ninety-eight thousand, seventy-three".