9901601 has 2 divisors, whose sum is σ = 9901602. Its totient is φ = 9901600.

The previous prime is 9901571. The next prime is 9901609. The reversal of 9901601 is 1061099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 2719201 = 2680^2 + 1649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9901601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9901609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950800 + 4950801.

It is an arithmetic number, because the mean of its divisors is an integer number (4950801).

Almost surely, 2^9901601 is an apocalyptic number.

It is an amenable number.

9901601 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901601 is an equidigital number, since it uses as much as digits as its factorization.

9901601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 9901601 is about 3146.6809498263. The cubic root of 9901601 is about 214.7344910723.

The spelling of 9901601 in words is "nine million, nine hundred one thousand, six hundred one".