11712987619 has 2 divisors, whose sum is σ = 11712987620. Its totient is φ = 11712987618.

The previous prime is 11712987617. The next prime is 11712987673. The reversal of 11712987619 is 91678921711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11712987619 - 2¹ = 11712987617 is a prime.

It is a super-2 number, since 2×11712987619² (a number of 21 digits) contains 22 as substring.

Together with 11712987617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11712987617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5856493809 + 5856493810.

It is an arithmetic number, because the mean of its divisors is an integer number (5856493810).

Almost surely, 2^11712987619 is an apocalyptic number.

11712987619 is a deficient number, since it is larger than the sum of its proper divisors (1).

11712987619 is an equidigital number, since it uses as much as digits as its factorization.

11712987619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 52.

The spelling of 11712987619 in words is "eleven billion, seven hundred twelve million, nine hundred eighty-seven thousand, six hundred nineteen".