9969697 has 2 divisors, whose sum is σ = 9969698. Its totient is φ = 9969696.

The previous prime is 9969689. The next prime is 9969703. The reversal of 9969697 is 7969699.

9969697 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5308416 + 4661281 = 2304^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 9969697 - 2³ = 9969689 is a prime.

It is not a weakly prime, because it can be changed into another prime (9969637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984848 + 4984849.

It is an arithmetic number, because the mean of its divisors is an integer number (4984849).

Almost surely, 2^9969697 is an apocalyptic number.

It is an amenable number.

9969697 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969697 is an equidigital number, since it uses as much as digits as its factorization.

9969697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 55.

The square root of 9969697 is about 3157.4826998734. The cubic root of 9969697 is about 215.2256293669.

It can be divided in two parts, 99 and 69697, that added together give a palindrome (69796).

The spelling of 9969697 in words is "nine million, nine hundred sixty-nine thousand, six hundred ninety-seven".