1919247919 has 4 divisors (see below), whose sum is σ = 1919370960. Its totient is φ = 1919124880.

The previous prime is 1919247907. The next prime is 1919247959. The reversal of 1919247919 is 9197429191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1919247919 - 2⁷ = 1919247791 is a prime.

It is a super-2 number, since 2×1919247919² = 7367025149171661122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919247959) 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 3 ways as a sum of consecutive naturals, for example, 34027 + ... + 70684.

It is an arithmetic number, because the mean of its divisors is an integer number (479842740).

Almost surely, 2^1919247919 is an apocalyptic number.

1919247919 is a deficient number, since it is larger than the sum of its proper divisors (123041).

1919247919 is a wasteful number, since it uses less digits than its factorization.

1919247919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123040.

The product of its digits is 367416, while the sum is 52.

The square root of 1919247919 is about 43809.2218488300. The cubic root of 1919247919 is about 1242.7306971230.

The spelling of 1919247919 in words is "one billion, nine hundred nineteen million, two hundred forty-seven thousand, nine hundred nineteen".