9699509 has 2 divisors, whose sum is σ = 9699510. Its totient is φ = 9699508.

The previous prime is 9699461. The next prime is 9699511. The reversal of 9699509 is 9059969.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6100900 + 3598609 = 2470^2 + 1897^2 .

It is an emirp because it is prime and its reverse (9059969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9699509 - 2¹⁶ = 9633973 is a prime.

Together with 9699511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9699409) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4849754 + 4849755.

It is an arithmetic number, because the mean of its divisors is an integer number (4849755).

Almost surely, 2^9699509 is an apocalyptic number.

It is an amenable number.

9699509 is a deficient number, since it is larger than the sum of its proper divisors (1).

9699509 is an equidigital number, since it uses as much as digits as its factorization.

9699509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 9699509 is about 3114.4034741825. The cubic root of 9699509 is about 213.2635250652.

The spelling of 9699509 in words is "nine million, six hundred ninety-nine thousand, five hundred nine".