980645569 has 2 divisors, whose sum is σ = 980645570. Its totient is φ = 980645568.

The previous prime is 980645563. The next prime is 980645639. The reversal of 980645569 is 965546089.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666930625 + 313714944 = 25825^2 + 17712^2 .

It is a cyclic number.

It is not a de Polignac number, because 980645569 - 2¹³ = 980637377 is a prime.

It is a super-2 number, since 2×980645569² = 1923331463998667522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (980645563) 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, 490322784 + 490322785.

It is an arithmetic number, because the mean of its divisors is an integer number (490322785).

Almost surely, 2^980645569 is an apocalyptic number.

It is an amenable number.

980645569 is a deficient number, since it is larger than the sum of its proper divisors (1).

980645569 is an equidigital number, since it uses as much as digits as its factorization.

980645569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The square root of 980645569 is about 31315.2609601134. The cubic root of 980645569 is about 993.5064480526.

The spelling of 980645569 in words is "nine hundred eighty million, six hundred forty-five thousand, five hundred sixty-nine".