1919131169 has 2 divisors, whose sum is σ = 1919131170. Its totient is φ = 1919131168.

The previous prime is 1919131147. The next prime is 1919131171. The reversal of 1919131169 is 9611319191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906457569 + 12673600 = 43663^2 + 3560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919131169 - 2²⁴ = 1902353953 is a prime.

It is a super-2 number, since 2×1919131169² = 7366128887654613122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1919131171, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1919131469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959565584 + 959565585.

It is an arithmetic number, because the mean of its divisors is an integer number (959565585).

Almost surely, 2^1919131169 is an apocalyptic number.

It is an amenable number.

1919131169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919131169 is an equidigital number, since it uses as much as digits as its factorization.

1919131169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 41.

The square root of 1919131169 is about 43807.8893465549. The cubic root of 1919131169 is about 1242.7054977120.

The spelling of 1919131169 in words is "one billion, nine hundred nineteen million, one hundred thirty-one thousand, one hundred sixty-nine".