9699349921 has 2 divisors, whose sum is σ = 9699349922. Its totient is φ = 9699349920.

The previous prime is 9699349897. The next prime is 9699349927. The reversal of 9699349921 is 1299439969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7879047696 + 1820302225 = 88764^2 + 42665^2 .

It is an emirp because it is prime and its reverse (1299439969) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9699349921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9699349921.

It is not a weakly prime, because it can be changed into another prime (9699349927) 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, 4849674960 + 4849674961.

It is an arithmetic number, because the mean of its divisors is an integer number (4849674961).

Almost surely, 2^9699349921 is an apocalyptic number.

It is an amenable number.

9699349921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9699349921 is an equidigital number, since it uses as much as digits as its factorization.

9699349921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8503056, while the sum is 61.

The square root of 9699349921 is about 98485.2776865659. The cubic root of 9699349921 is about 2132.6235916654.

The spelling of 9699349921 in words is "nine billion, six hundred ninety-nine million, three hundred forty-nine thousand, nine hundred twenty-one".