9699649 has 2 divisors, whose sum is σ = 9699650. Its totient is φ = 9699648.

The previous prime is 9699647. The next prime is 9699653. The reversal of 9699649 is 9469969.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6927424 + 2772225 = 2632^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 9699649 - 2¹ = 9699647 is a prime.

Together with 9699647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9699596 and 9699605.

It is not a weakly prime, because it can be changed into another prime (9699643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4849824 + 4849825.

It is an arithmetic number, because the mean of its divisors is an integer number (4849825).

Almost surely, 2^9699649 is an apocalyptic number.

It is an amenable number.

9699649 is a deficient number, since it is larger than the sum of its proper divisors (1).

9699649 is an equidigital number, since it uses as much as digits as its factorization.

9699649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 52.

The square root of 9699649 is about 3114.4259503157. The cubic root of 9699649 is about 213.2645511223.

The spelling of 9699649 in words is "nine million, six hundred ninety-nine thousand, six hundred forty-nine".