91760606921 has 2 divisors, whose sum is σ = 91760606922. Its totient is φ = 91760606920.

The previous prime is 91760606909. The next prime is 91760606953. The reversal of 91760606921 is 12960606719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62257735225 + 29502871696 = 249515^2 + 171764^2 .

It is a cyclic number.

It is not a de Polignac number, because 91760606921 - 2¹⁸ = 91760344777 is a prime.

It is not a weakly prime, because it can be changed into another prime (91760606981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45880303460 + 45880303461.

It is an arithmetic number, because the mean of its divisors is an integer number (45880303461).

Almost surely, 2^91760606921 is an apocalyptic number.

It is an amenable number.

91760606921 is a deficient number, since it is larger than the sum of its proper divisors (1).

91760606921 is an equidigital number, since it uses as much as digits as its factorization.

91760606921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 91760606921 in words is "ninety-one billion, seven hundred sixty million, six hundred six thousand, nine hundred twenty-one".