1919005801 has 2 divisors, whose sum is σ = 1919005802. Its totient is φ = 1919005800.

The previous prime is 1919005793. The next prime is 1919005859. The reversal of 1919005801 is 1085009191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1465358400 + 453647401 = 38280^2 + 21299^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919005801 - 2³ = 1919005793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1919005001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959502900 + 959502901.

It is an arithmetic number, because the mean of its divisors is an integer number (959502901).

Almost surely, 2^1919005801 is an apocalyptic number.

It is an amenable number.

1919005801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919005801 is an equidigital number, since it uses as much as digits as its factorization.

1919005801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 1919005801 is about 43806.4584393671. The cubic root of 1919005801 is about 1242.6784370473.

The spelling of 1919005801 in words is "one billion, nine hundred nineteen million, five thousand, eight hundred one".