1919811029 has 2 divisors, whose sum is σ = 1919811030. Its totient is φ = 1919811028.

The previous prime is 1919811011. The next prime is 1919811031. The reversal of 1919811029 is 9201189191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1766100625 + 153710404 = 42025^2 + 12398^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919811029 - 2¹⁶ = 1919745493 is a prime.

Together with 1919811031, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1919811329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959905514 + 959905515.

It is an arithmetic number, because the mean of its divisors is an integer number (959905515).

Almost surely, 2^1919811029 is an apocalyptic number.

It is an amenable number.

1919811029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919811029 is an equidigital number, since it uses as much as digits as its factorization.

1919811029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 41.

The square root of 1919811029 is about 43815.6482206985. The cubic root of 1919811029 is about 1242.8522248747.

The spelling of 1919811029 in words is "one billion, nine hundred nineteen million, eight hundred eleven thousand, twenty-nine".