1919030849 has 2 divisors, whose sum is σ = 1919030850. Its totient is φ = 1919030848.

The previous prime is 1919030819. The next prime is 1919030881. The reversal of 1919030849 is 9480309191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1725820849 + 193210000 = 41543^2 + 13900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919030849 - 2⁸ = 1919030593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1919030809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959515424 + 959515425.

It is an arithmetic number, because the mean of its divisors is an integer number (959515425).

Almost surely, 2^1919030849 is an apocalyptic number.

It is an amenable number.

1919030849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919030849 is an equidigital number, since it uses as much as digits as its factorization.

1919030849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1919030849 is about 43806.7443323514. The cubic root of 1919030849 is about 1242.6838437487.

The spelling of 1919030849 in words is "one billion, nine hundred nineteen million, thirty thousand, eight hundred forty-nine".