1983221449 has 4 divisors (see below), whose sum is σ = 2163514320. Its totient is φ = 1802928580.

The previous prime is 1983221399. The next prime is 1983221473. The reversal of 1983221449 is 9441223891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1983221449 - 2⁹ = 1983220937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1983221549) 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, 90146419 + ... + 90146440.

It is an arithmetic number, because the mean of its divisors is an integer number (540878580).

Almost surely, 2^1983221449 is an apocalyptic number.

It is an amenable number.

1983221449 is a deficient number, since it is larger than the sum of its proper divisors (180292871).

1983221449 is a wasteful number, since it uses less digits than its factorization.

1983221449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180292870.

The product of its digits is 124416, while the sum is 43.

The square root of 1983221449 is about 44533.3745521266. The cubic root of 1983221449 is about 1256.3878762099.

The spelling of 1983221449 in words is "one billion, nine hundred eighty-three million, two hundred twenty-one thousand, four hundred forty-nine".