11978932219 has 2 divisors, whose sum is σ = 11978932220. Its totient is φ = 11978932218.

The previous prime is 11978932213. The next prime is 11978932247. The reversal of 11978932219 is 91223987911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11978932219 - 2²¹ = 11976835067 is a prime.

It is a super-2 number, since 2×11978932219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11978932213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5989466109 + 5989466110.

It is an arithmetic number, because the mean of its divisors is an integer number (5989466110).

Almost surely, 2^11978932219 is an apocalyptic number.

11978932219 is a deficient number, since it is larger than the sum of its proper divisors (1).

11978932219 is an equidigital number, since it uses as much as digits as its factorization.

11978932219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 52.

The spelling of 11978932219 in words is "eleven billion, nine hundred seventy-eight million, nine hundred thirty-two thousand, two hundred nineteen".