980143805621 has 2 divisors, whose sum is σ = 980143805622. Its totient is φ = 980143805620.

The previous prime is 980143805617. The next prime is 980143805623. The reversal of 980143805621 is 126508341089.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978180340900 + 1963464721 = 989030^2 + 44311^2 .

It is a cyclic number.

It is not a de Polignac number, because 980143805621 - 2² = 980143805617 is a prime.

Together with 980143805623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (980143805623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490071902810 + 490071902811.

It is an arithmetic number, because the mean of its divisors is an integer number (490071902811).

Almost surely, 2^980143805621 is an apocalyptic number.

It is an amenable number.

980143805621 is a deficient number, since it is larger than the sum of its proper divisors (1).

980143805621 is an equidigital number, since it uses as much as digits as its factorization.

980143805621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 980143805621 in words is "nine hundred eighty billion, one hundred forty-three million, eight hundred five thousand, six hundred twenty-one".