9999653 has 2 divisors, whose sum is σ = 9999654. Its totient is φ = 9999652.

The previous prime is 9999637. The next prime is 9999659. The reversal of 9999653 is 3569999.

9999653 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., 9721924 + 277729 = 3118^2 + 527^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999653 - 2⁴ = 9999637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999826 + 4999827.

It is an arithmetic number, because the mean of its divisors is an integer number (4999827).

Almost surely, 2^9999653 is an apocalyptic number.

It is an amenable number.

9999653 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999653 is an equidigital number, since it uses as much as digits as its factorization.

9999653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 590490, while the sum is 50.

The square root of 9999653 is about 3162.2227941750. Note that the first 3 decimals coincide. The cubic root of 9999653 is about 215.4409770116.

The spelling of 9999653 in words is "nine million, nine hundred ninety-nine thousand, six hundred fifty-three".