1984078849 has 3 divisors (see below), whose sum is σ = 1984123393. Its totient is φ = 1984034306.

The previous prime is 1984078829. The next prime is 1984078871. The reversal of 1984078849 is 9488704891.

The square root of 1984078849 is 44543.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9488704891 = 317 ⋅29932823.

It is not a de Polignac number, because 1984078849 - 2²⁵ = 1950524417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1984078793 and 1984078802.

It is not an unprimeable number, because it can be changed into a prime (1984078829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22272 + ... + 66814.

Almost surely, 2^1984078849 is an apocalyptic number.

1984078849 is the 44543-rd square number.

1984078849 is the 22272-nd centered octagonal number.

It is an amenable number.

1984078849 is a deficient number, since it is larger than the sum of its proper divisors (44544).

1984078849 is an frugal number, since it uses more digits than its factorization.

1984078849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89086 (or 44543 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The cubic root of 1984078849 is about 1256.5689068868.

It can be divided in two parts, 19840 and 78849, that added together give a palindrome (98689).

The spelling of 1984078849 in words is "one billion, nine hundred eighty-four million, seventy-eight thousand, eight hundred forty-nine".