91104940573 has 2 divisors, whose sum is σ = 91104940574. Its totient is φ = 91104940572.

The previous prime is 91104940571. The next prime is 91104940583. The reversal of 91104940573 is 37504940119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89615212164 + 1489728409 = 299358^2 + 38597^2 .

It is a cyclic number.

It is not a de Polignac number, because 91104940573 - 2¹ = 91104940571 is a prime.

It is a super-2 number, since 2×91104940573² (a number of 23 digits) contains 22 as substring.

Together with 91104940571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91104940571) 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, 45552470286 + 45552470287.

It is an arithmetic number, because the mean of its divisors is an integer number (45552470287).

Almost surely, 2^91104940573 is an apocalyptic number.

It is an amenable number.

91104940573 is a deficient number, since it is larger than the sum of its proper divisors (1).

91104940573 is an equidigital number, since it uses as much as digits as its factorization.

91104940573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 91104940573 in words is "ninety-one billion, one hundred four million, nine hundred forty thousand, five hundred seventy-three".