1919421523 has 2 divisors, whose sum is σ = 1919421524. Its totient is φ = 1919421522.

The previous prime is 1919421407. The next prime is 1919421527. The reversal of 1919421523 is 3251249191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1919421523 - 2⁹ = 1919421011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1919421527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959710761 + 959710762.

It is an arithmetic number, because the mean of its divisors is an integer number (959710762).

Almost surely, 2^1919421523 is an apocalyptic number.

1919421523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919421523 is an equidigital number, since it uses as much as digits as its factorization.

1919421523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 1919421523 is about 43811.2031676830. The cubic root of 1919421523 is about 1242.7681660560.

The spelling of 1919421523 in words is "one billion, nine hundred nineteen million, four hundred twenty-one thousand, five hundred twenty-three".