2919020389 has 4 divisors (see below), whose sum is σ = 2919195180. Its totient is φ = 2918845600.

The previous prime is 2919020387. The next prime is 2919020437. The reversal of 2919020389 is 9830209192.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2009997889 + 909022500 = 44833^2 + 30150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2919020389 - 2¹ = 2919020387 is a prime.

It is a super-2 number, since 2×2919020389² = 17041360062795422642, 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 (2919020383) 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, 59344 + ... + 96745.

It is an arithmetic number, because the mean of its divisors is an integer number (729798795).

Almost surely, 2^2919020389 is an apocalyptic number.

It is an amenable number.

2919020389 is a deficient number, since it is larger than the sum of its proper divisors (174791).

2919020389 is a wasteful number, since it uses less digits than its factorization.

2919020389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174790.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 2919020389 is about 54027.9593266301. The cubic root of 2919020389 is about 1429.1540449427.

The spelling of 2919020389 in words is "two billion, nine hundred nineteen million, twenty thousand, three hundred eighty-nine".