91923608879 has 2 divisors, whose sum is σ = 91923608880. Its totient is φ = 91923608878.

The previous prime is 91923608873. The next prime is 91923608911. The reversal of 91923608879 is 97880632919.

It is a weak prime.

It is an emirp because it is prime and its reverse (97880632919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91923608879 - 2¹⁶ = 91923543343 is a prime.

It is a super-3 number, since 3×91923608879³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91923608873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45961804439 + 45961804440.

It is an arithmetic number, because the mean of its divisors is an integer number (45961804440).

Almost surely, 2^91923608879 is an apocalyptic number.

91923608879 is a deficient number, since it is larger than the sum of its proper divisors (1).

91923608879 is an equidigital number, since it uses as much as digits as its factorization.

91923608879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 91923608879 in words is "ninety-one billion, nine hundred twenty-three million, six hundred eight thousand, eight hundred seventy-nine".