9870961 has 2 divisors, whose sum is σ = 9870962. Its totient is φ = 9870960.

The previous prime is 9870953. The next prime is 9870967. The reversal of 9870961 is 1690789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6426225 + 3444736 = 2535^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 9870961 - 2³ = 9870953 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (9870967) 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, 4935480 + 4935481.

It is an arithmetic number, because the mean of its divisors is an integer number (4935481).

Almost surely, 2^9870961 is an apocalyptic number.

It is an amenable number.

9870961 is a deficient number, since it is larger than the sum of its proper divisors (1).

9870961 is an equidigital number, since it uses as much as digits as its factorization.

9870961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 9870961 is about 3141.8085555934. The cubic root of 9870961 is about 214.5127672284.

The spelling of 9870961 in words is "nine million, eight hundred seventy thousand, nine hundred sixty-one".