1919774493 has 64 divisors (see below), whose sum is σ = 3558105600. Its totient is φ = 995950080.

The previous prime is 1919774471. The next prime is 1919774501. The reversal of 1919774493 is 3944779191.

1919774493 is a `hidden beast` number, since 1 + 9 + 197 + 7 + 449 + 3 = 666.

It is not a de Polignac number, because 1919774493 - 2⁸ = 1919774237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919774413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143473 + ... + 156281.

It is an arithmetic number, because the mean of its divisors is an integer number (55595400).

Almost surely, 2^1919774493 is an apocalyptic number.

1919774493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1919774493 is a deficient number, since it is larger than the sum of its proper divisors (1638331107).

1919774493 is a wasteful number, since it uses less digits than its factorization.

1919774493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12899 (or 12893 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 1919774493 is about 43815.2312900434. The cubic root of 1919774493 is about 1242.8443405680.

The spelling of 1919774493 in words is "one billion, nine hundred nineteen million, seven hundred seventy-four thousand, four hundred ninety-three".