9969797 has 2 divisors, whose sum is σ = 9969798. Its totient is φ = 9969796.

The previous prime is 9969793. The next prime is 9969809. The reversal of 9969797 is 7979699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9431041 + 538756 = 3071^2 + 734^2 .

It is a cyclic number.

It is not a de Polignac number, because 9969797 - 2² = 9969793 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9969793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984898 + 4984899.

It is an arithmetic number, because the mean of its divisors is an integer number (4984899).

Almost surely, 2^9969797 is an apocalyptic number.

It is an amenable number.

9969797 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969797 is an equidigital number, since it uses as much as digits as its factorization.

9969797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1928934, while the sum is 56.

The square root of 9969797 is about 3157.4985352332. The cubic root of 9969797 is about 215.2263489639.

It can be divided in two parts, 99 and 69797, that multiplied together give a triangular number (6909903 = T₃₇₁₇).

The spelling of 9969797 in words is "nine million, nine hundred sixty-nine thousand, seven hundred ninety-seven".