1980880843 has 2 divisors, whose sum is σ = 1980880844. Its totient is φ = 1980880842.

The previous prime is 1980880841. The next prime is 1980880861. The reversal of 1980880843 is 3480880891.

It is a weak prime.

It is an emirp because it is prime and its reverse (3480880891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1980880843 - 2¹ = 1980880841 is a prime.

Together with 1980880841, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1980880841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990440421 + 990440422.

It is an arithmetic number, because the mean of its divisors is an integer number (990440422).

Almost surely, 2^1980880843 is an apocalyptic number.

1980880843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980880843 is an equidigital number, since it uses as much as digits as its factorization.

1980880843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 1980880843 is about 44507.0875591742. The cubic root of 1980880843 is about 1255.8934169483.

The spelling of 1980880843 in words is "one billion, nine hundred eighty million, eight hundred eighty thousand, eight hundred forty-three".