1919191002 has 8 divisors (see below), whose sum is σ = 3838382016. Its totient is φ = 639730332.

The previous prime is 1919190937. The next prime is 1919191009. The reversal of 1919191002 is 2001919191.

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

1919191002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1919191009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159932578 + ... + 159932589.

It is an arithmetic number, because the mean of its divisors is an integer number (479797752).

Almost surely, 2^1919191002 is an apocalyptic number.

1919191002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1919191002 is a wasteful number, since it uses less digits than its factorization.

1919191002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319865172.

The product of its (nonzero) digits is 1458, while the sum is 33.

The square root of 1919191002 is about 43808.5722433407. The cubic root of 1919191002 is about 1242.7184122410.

The spelling of 1919191002 in words is "one billion, nine hundred nineteen million, one hundred ninety-one thousand, two".