1980703421 has 2 divisors, whose sum is σ = 1980703422. Its totient is φ = 1980703420.

The previous prime is 1980703343. The next prime is 1980703427. The reversal of 1980703421 is 1243070891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1398012100 + 582691321 = 37390^2 + 24139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980703421 - 2¹⁰ = 1980702397 is a prime.

It is a super-2 number, since 2×1980703421² = 7846372083922206482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980703427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990351710 + 990351711.

It is an arithmetic number, because the mean of its divisors is an integer number (990351711).

Almost surely, 2^1980703421 is an apocalyptic number.

It is an amenable number.

1980703421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980703421 is an equidigital number, since it uses as much as digits as its factorization.

1980703421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1980703421 is about 44505.0943263802. The cubic root of 1980703421 is about 1255.8559201994.

The spelling of 1980703421 in words is "one billion, nine hundred eighty million, seven hundred three thousand, four hundred twenty-one".