9965651 has 2 divisors, whose sum is σ = 9965652. Its totient is φ = 9965650.

The previous prime is 9965611. The next prime is 9965687. The reversal of 9965651 is 1565699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9965651 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9965599 and 9965608.

It is not a weakly prime, because it can be changed into another prime (9965611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982825 + 4982826.

It is an arithmetic number, because the mean of its divisors is an integer number (4982826).

Almost surely, 2^9965651 is an apocalyptic number.

9965651 is a deficient number, since it is larger than the sum of its proper divisors (1).

9965651 is an equidigital number, since it uses as much as digits as its factorization.

9965651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 41.

The square root of 9965651 is about 3156.8419345922. The cubic root of 9965651 is about 215.1965104371.

The spelling of 9965651 in words is "nine million, nine hundred sixty-five thousand, six hundred fifty-one".