1919125049 has 2 divisors, whose sum is σ = 1919125050. Its totient is φ = 1919125048.

The previous prime is 1919125003. The next prime is 1919125057. The reversal of 1919125049 is 9405219191.

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., 1071907600 + 847217449 = 32740^2 + 29107^2 .

It is an emirp because it is prime and its reverse (9405219191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1919125049 - 2¹² = 1919120953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1919124997 and 1919125015.

It is not a weakly prime, because it can be changed into another prime (1919125069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959562524 + 959562525.

It is an arithmetic number, because the mean of its divisors is an integer number (959562525).

Almost surely, 2^1919125049 is an apocalyptic number.

It is an amenable number.

1919125049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919125049 is an equidigital number, since it uses as much as digits as its factorization.

1919125049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1919125049 is about 43807.8194960671. The cubic root of 1919125049 is about 1242.7041767383.

The spelling of 1919125049 in words is "one billion, nine hundred nineteen million, one hundred twenty-five thousand, forty-nine".