11719999 has 2 divisors, whose sum is σ = 11720000. Its totient is φ = 11719998.

The previous prime is 11719997. The next prime is 11720029. The reversal of 11719999 is 99991711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11719999 - 2¹ = 11719997 is a prime.

It is a super-4 number, since 4×11719999⁴ (a number of 29 digits) contains 4444 as substring.

Together with 11719997, it forms a pair of twin primes.

It is a Chen prime.

11719999 is a modest number, since divided by 9999 gives 1171 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11719997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859999 + 5860000.

It is an arithmetic number, because the mean of its divisors is an integer number (5860000).

Almost surely, 2^11719999 is an apocalyptic number.

11719999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11719999 is an equidigital number, since it uses as much as digits as its factorization.

11719999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45927, while the sum is 46.

The square root of 11719999 is about 3423.4484076732. The cubic root of 11719999 is about 227.1481434480.

The spelling of 11719999 in words is "eleven million, seven hundred nineteen thousand, nine hundred ninety-nine".