91719852227 has 4 divisors (see below), whose sum is σ = 91722766776. Its totient is φ = 91716937680.

The previous prime is 91719852223. The next prime is 91719852251. The reversal of 91719852227 is 72225891719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72225891719 = 40031 ⋅1804249.

It is a cyclic number.

It is not a de Polignac number, because 91719852227 - 2² = 91719852223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91719852221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409549 + ... + 1473182.

It is an arithmetic number, because the mean of its divisors is an integer number (22930691694).

Almost surely, 2^91719852227 is an apocalyptic number.

91719852227 is a deficient number, since it is larger than the sum of its proper divisors (2914549).

91719852227 is a wasteful number, since it uses less digits than its factorization.

91719852227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914548.

The product of its digits is 1270080, while the sum is 53.

The spelling of 91719852227 in words is "ninety-one billion, seven hundred nineteen million, eight hundred fifty-two thousand, two hundred twenty-seven".