1919919079 has 8 divisors (see below), whose sum is σ = 2068584560. Its totient is φ = 1771393536.

The previous prime is 1919919077. The next prime is 1919919107. The reversal of 1919919079 is 9709199191.

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

It is a cyclic number.

It is not a de Polignac number, because 1919919079 - 2¹ = 1919919077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919919077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5562 + ... + 62215.

It is an arithmetic number, because the mean of its divisors is an integer number (258573070).

Almost surely, 2^1919919079 is an apocalyptic number.

1919919079 is a deficient number, since it is larger than the sum of its proper divisors (148665481).

1919919079 is a wasteful number, since it uses less digits than its factorization.

1919919079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69969.

The product of its (nonzero) digits is 413343, while the sum is 55.

The square root of 1919919079 is about 43816.8812103281. The cubic root of 1919919079 is about 1242.8755410000.

The spelling of 1919919079 in words is "one billion, nine hundred nineteen million, nine hundred nineteen thousand, seventy-nine".