11891108347 has 2 divisors, whose sum is σ = 11891108348. Its totient is φ = 11891108346.

The previous prime is 11891108321. The next prime is 11891108357. The reversal of 11891108347 is 74380119811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11891108347 - 2¹¹ = 11891106299 is a prime.

It is not a weakly prime, because it can be changed into another prime (11891108357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5945554173 + 5945554174.

It is an arithmetic number, because the mean of its divisors is an integer number (5945554174).

Almost surely, 2^11891108347 is an apocalyptic number.

11891108347 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891108347 is an equidigital number, since it uses as much as digits as its factorization.

11891108347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 43.

The spelling of 11891108347 in words is "eleven billion, eight hundred ninety-one million, one hundred eight thousand, three hundred forty-seven".