1919793997 has 16 divisors (see below), whose sum is σ = 2168337600. Its totient is φ = 1683687040.

The previous prime is 1919793977. The next prime is 1919794033. The reversal of 1919793997 is 7993979191.

It is a cyclic number.

It is not a de Polignac number, because 1919793997 - 2¹⁵ = 1919761229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919793937) 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 15 ways as a sum of consecutive naturals, for example, 645129 + ... + 648097.

It is an arithmetic number, because the mean of its divisors is an integer number (135521100).

Almost surely, 2^1919793997 is an apocalyptic number.

It is an amenable number.

1919793997 is a deficient number, since it is larger than the sum of its proper divisors (248543603).

1919793997 is a wasteful number, since it uses less digits than its factorization.

1919793997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036.

The product of its digits is 8680203, while the sum is 64.

The square root of 1919793997 is about 43815.4538604817. The cubic root of 1919793997 is about 1242.8485494571.

The spelling of 1919793997 in words is "one billion, nine hundred nineteen million, seven hundred ninety-three thousand, nine hundred ninety-seven".