9561901 has 2 divisors, whose sum is σ = 9561902. Its totient is φ = 9561900.

The previous prime is 9561869. The next prime is 9561911. The reversal of 9561901 is 1091659.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9455625 + 106276 = 3075^2 + 326^2 .

It is an emirp because it is prime and its reverse (1091659) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9561901 - 2⁵ = 9561869 is a prime.

9561901 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9561911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4780950 + 4780951.

It is an arithmetic number, because the mean of its divisors is an integer number (4780951).

Almost surely, 2^9561901 is an apocalyptic number.

It is an amenable number.

9561901 is a deficient number, since it is larger than the sum of its proper divisors (1).

9561901 is an equidigital number, since it uses as much as digits as its factorization.

9561901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 9561901 is about 3092.2323651369. The cubic root of 9561901 is about 212.2501867134.

The spelling of 9561901 in words is "nine million, five hundred sixty-one thousand, nine hundred one".