91867389311 has 4 divisors (see below), whose sum is σ = 92568667224. Its totient is φ = 91166111400.

The previous prime is 91867389277. The next prime is 91867389349. The reversal of 91867389311 is 11398376819.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91867389311 - 2¹⁸ = 91867127167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91867389011) 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 in 3 ways as a sum of consecutive naturals, for example, 350638760 + ... + 350639021.

It is an arithmetic number, because the mean of its divisors is an integer number (23142166806).

Almost surely, 2^91867389311 is an apocalyptic number.

91867389311 is a deficient number, since it is larger than the sum of its proper divisors (701277913).

91867389311 is a wasteful number, since it uses less digits than its factorization.

91867389311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701277912.

The product of its digits is 1959552, while the sum is 56.

The spelling of 91867389311 in words is "ninety-one billion, eight hundred sixty-seven million, three hundred eighty-nine thousand, three hundred eleven".