1922449209 has 8 divisors (see below), whose sum is σ = 2569214592. Its totient is φ = 1278658320.

The previous prime is 1922449187. The next prime is 1922449213. The reversal of 1922449209 is 9029442291.

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

It is not a de Polignac number, because 1922449209 - 2⁸ = 1922448953 is a prime.

It is a super-2 number, since 2×1922449209² = 7391621922369451362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1922449609) 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, 742114 + ... + 744699.

It is an arithmetic number, because the mean of its divisors is an integer number (321151824).

Almost surely, 2^1922449209 is an apocalyptic number.

It is an amenable number.

1922449209 is a deficient number, since it is larger than the sum of its proper divisors (646765383).

1922449209 is a wasteful number, since it uses less digits than its factorization.

1922449209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487247.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1922449209 is about 43845.7433395763. The cubic root of 1922449209 is about 1243.4212682254.

The spelling of 1922449209 in words is "one billion, nine hundred twenty-two million, four hundred forty-nine thousand, two hundred nine".