1980873049 has 3 divisors (see below), whose sum is σ = 1980917557. Its totient is φ = 1980828542.

The previous prime is 1980873047. The next prime is 1980873053. The reversal of 1980873049 is 9403780891.

It is a happy number.

The square root of 1980873049 is 44507.

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: 9403780891 = 4421 ⋅2127071.

It is not a de Polignac number, because 1980873049 - 2¹ = 1980873047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1980872993 and 1980873011.

It is not an unprimeable number, because it can be changed into a prime (1980873047) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 22254 + ... + 66760.

Almost surely, 2^1980873049 is an apocalyptic number.

1980873049 is the 44507-th square number.

1980873049 is the 22254-th centered octagonal number.

It is an amenable number.

1980873049 is a deficient number, since it is larger than the sum of its proper divisors (44508).

1980873049 is an frugal number, since it uses more digits than its factorization.

1980873049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89014 (or 44507 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The cubic root of 1980873049 is about 1255.8917697945.

Multiplying 1980873049 by its sum of digits (49), we get a square (97062779401 = 311549²).

The spelling of 1980873049 in words is "one billion, nine hundred eighty million, eight hundred seventy-three thousand, forty-nine".