1980538273 has 4 divisors (see below), whose sum is σ = 2263472320. Its totient is φ = 1697604228.

The previous prime is 1980538243. The next prime is 1980538277. The reversal of 1980538273 is 3728350891.

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 1980538273 - 2¹³ = 1980530081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980538277) 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, 141467013 + ... + 141467026.

It is an arithmetic number, because the mean of its divisors is an integer number (565868080).

Almost surely, 2^1980538273 is an apocalyptic number.

It is an amenable number.

1980538273 is a deficient number, since it is larger than the sum of its proper divisors (282934047).

1980538273 is an equidigital number, since it uses as much as digits as its factorization.

1980538273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282934046.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 1980538273 is about 44503.2389046011. The cubic root of 1980538273 is about 1255.8210154520.

The spelling of 1980538273 in words is "one billion, nine hundred eighty million, five hundred thirty-eight thousand, two hundred seventy-three".