91327573 has 2 divisors, whose sum is σ = 91327574. Its totient is φ = 91327572.

The previous prime is 91327559. The next prime is 91327591. The reversal of 91327573 is 37572319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52664049 + 38663524 = 7257^2 + 6218^2 .

It is an emirp because it is prime and its reverse (37572319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91327573 - 2¹³ = 91319381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91327543) 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, 45663786 + 45663787.

It is an arithmetic number, because the mean of its divisors is an integer number (45663787).

Almost surely, 2^91327573 is an apocalyptic number.

It is an amenable number.

91327573 is a deficient number, since it is larger than the sum of its proper divisors (1).

91327573 is an equidigital number, since it uses as much as digits as its factorization.

91327573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 37.

The square root of 91327573 is about 9556.5460810902. The cubic root of 91327573 is about 450.3332067110. Note that the first 3 decimals are identical.

The spelling of 91327573 in words is "ninety-one million, three hundred twenty-seven thousand, five hundred seventy-three".