9980869 has 2 divisors, whose sum is σ = 9980870. Its totient is φ = 9980868.

The previous prime is 9980863. The next prime is 9980899. The reversal of 9980869 is 9680899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6225025 + 3755844 = 2495^2 + 1938^2 .

It is a cyclic number.

It is not a de Polignac number, because 9980869 - 2⁵ = 9980837 is a prime.

It is a super-2 number, since 2×9980869² = 199235491990322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9980863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990434 + 4990435.

It is an arithmetic number, because the mean of its divisors is an integer number (4990435).

Almost surely, 2^9980869 is an apocalyptic number.

It is an amenable number.

9980869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9980869 is an equidigital number, since it uses as much as digits as its factorization.

9980869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 9980869 is about 3159.2513353641. The cubic root of 9980869 is about 215.3059929972.

The spelling of 9980869 in words is "nine million, nine hundred eighty thousand, eight hundred sixty-nine".