1980547717 has 2 divisors, whose sum is σ = 1980547718. Its totient is φ = 1980547716.

The previous prime is 1980547693. The next prime is 1980547741. The reversal of 1980547717 is 7177450891.

It is a balanced prime because it is at equal distance from previous prime (1980547693) and next prime (1980547741).

It can be written as a sum of positive squares in only one way, i.e., 1907855041 + 72692676 = 43679^2 + 8526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980547717 - 2¹¹ = 1980545669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980547117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990273858 + 990273859.

It is an arithmetic number, because the mean of its divisors is an integer number (990273859).

Almost surely, 2^1980547717 is an apocalyptic number.

It is an amenable number.

1980547717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980547717 is an equidigital number, since it uses as much as digits as its factorization.

1980547717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 49.

The square root of 1980547717 is about 44503.3450091114. The cubic root of 1980547717 is about 1255.8230115347.

The spelling of 1980547717 in words is "one billion, nine hundred eighty million, five hundred forty-seven thousand, seven hundred seventeen".