11719721479 has 2 divisors, whose sum is σ = 11719721480. Its totient is φ = 11719721478.

The previous prime is 11719721471. The next prime is 11719721543. The reversal of 11719721479 is 97412791711.

It is a weak prime.

It is an emirp because it is prime and its reverse (97412791711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11719721479 - 2³ = 11719721471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11719721471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5859860739 + 5859860740.

It is an arithmetic number, because the mean of its divisors is an integer number (5859860740).

Almost surely, 2^11719721479 is an apocalyptic number.

11719721479 is a deficient number, since it is larger than the sum of its proper divisors (1).

11719721479 is an equidigital number, since it uses as much as digits as its factorization.

11719721479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 49.

The spelling of 11719721479 in words is "eleven billion, seven hundred nineteen million, seven hundred twenty-one thousand, four hundred seventy-nine".