11919671 has 2 divisors, whose sum is σ = 11919672. Its totient is φ = 11919670.

The previous prime is 11919653. The next prime is 11919683. The reversal of 11919671 is 17691911.

It is a strong prime.

It is an emirp because it is prime and its reverse (17691911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11919671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11919071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5959835 + 5959836.

It is an arithmetic number, because the mean of its divisors is an integer number (5959836).

Almost surely, 2^11919671 is an apocalyptic number.

11919671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11919671 is an equidigital number, since it uses as much as digits as its factorization.

11919671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 35.

The square root of 11919671 is about 3452.4876538519. The cubic root of 11919671 is about 228.4308501835.

The spelling of 11919671 in words is "eleven million, nine hundred nineteen thousand, six hundred seventy-one".