9780689522 has 6 divisors (see below), whose sum is σ = 14671244079. Its totient is φ = 4890274830.

The previous prime is 9780689521. The next prime is 9780689531. The reversal of 9780689522 is 2259860879.

It can be written as a sum of positive squares in only one way, i.e., 4890344761 + 4890344761 = 69931^2 + 69931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=69931.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9780689521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 104897 + ... + 174827.

Almost surely, 2^9780689522 is an apocalyptic number.

9780689522 is a deficient number, since it is larger than the sum of its proper divisors (4890554557).

9780689522 is an frugal number, since it uses more digits than its factorization.

9780689522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139864 (or 69933 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 9780689522 is about 98897.3686303129. The cubic root of 9780689522 is about 2138.5684607388.

The spelling of 9780689522 in words is "nine billion, seven hundred eighty million, six hundred eighty-nine thousand, five hundred twenty-two".