1980380243 has 2 divisors, whose sum is σ = 1980380244. Its totient is φ = 1980380242.

The previous prime is 1980380219. The next prime is 1980380263. The reversal of 1980380243 is 3420830891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1980380243 - 2⁸ = 1980379987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1980380197 and 1980380206.

It is not a weakly prime, because it can be changed into another prime (1980380263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990190121 + 990190122.

It is an arithmetic number, because the mean of its divisors is an integer number (990190122).

Almost surely, 2^1980380243 is an apocalyptic number.

1980380243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980380243 is an equidigital number, since it uses as much as digits as its factorization.

1980380243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1980380243 is about 44501.4633804328. The cubic root of 1980380243 is about 1255.7876133080.

The spelling of 1980380243 in words is "one billion, nine hundred eighty million, three hundred eighty thousand, two hundred forty-three".