1919972089 has 8 divisors (see below), whose sum is σ = 2195502848. Its totient is φ = 1644753600.

The previous prime is 1919972071. The next prime is 1919972147. The reversal of 1919972089 is 9802799191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1919972089 - 2¹⁵ = 1919939321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1919972009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64737 + ... + 89614.

It is an arithmetic number, because the mean of its divisors is an integer number (274437856).

Almost surely, 2^1919972089 is an apocalyptic number.

It is an amenable number.

1919972089 is a deficient number, since it is larger than the sum of its proper divisors (275530759).

1919972089 is a wasteful number, since it uses less digits than its factorization.

1919972089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156135.

The product of its (nonzero) digits is 734832, while the sum is 55.

The square root of 1919972089 is about 43817.4861099995. The cubic root of 1919972089 is about 1242.8869797158.

The spelling of 1919972089 in words is "one billion, nine hundred nineteen million, nine hundred seventy-two thousand, eighty-nine".