1919133641 has 2 divisors, whose sum is σ = 1919133642. Its totient is φ = 1919133640.

The previous prime is 1919133613. The next prime is 1919133659. The reversal of 1919133641 is 1463319191.

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., 1076102416 + 843031225 = 32804^2 + 29035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919133641 - 2¹⁰ = 1919132617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1919133595 and 1919133604.

It is not a weakly prime, because it can be changed into another prime (1919133661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959566820 + 959566821.

It is an arithmetic number, because the mean of its divisors is an integer number (959566821).

Almost surely, 2^1919133641 is an apocalyptic number.

It is an amenable number.

1919133641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919133641 is an equidigital number, since it uses as much as digits as its factorization.

1919133641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 1919133641 is about 43807.9175606419. The cubic root of 1919133641 is about 1242.7060312810.

The spelling of 1919133641 in words is "one billion, nine hundred nineteen million, one hundred thirty-three thousand, six hundred forty-one".