91834872323 has 2 divisors, whose sum is σ = 91834872324. Its totient is φ = 91834872322.

The previous prime is 91834872319. The next prime is 91834872329. The reversal of 91834872323 is 32327843819.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32327843819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91834872323 - 2² = 91834872319 is a prime.

It is a super-2 number, since 2×91834872323² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91834872329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45917436161 + 45917436162.

It is an arithmetic number, because the mean of its divisors is an integer number (45917436162).

Almost surely, 2^91834872323 is an apocalyptic number.

91834872323 is a deficient number, since it is larger than the sum of its proper divisors (1).

91834872323 is an equidigital number, since it uses as much as digits as its factorization.

91834872323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The spelling of 91834872323 in words is "ninety-one billion, eight hundred thirty-four million, eight hundred seventy-two thousand, three hundred twenty-three".