9950861 has 2 divisors, whose sum is σ = 9950862. Its totient is φ = 9950860.

The previous prime is 9950833. The next prime is 9950867. The reversal of 9950861 is 1680599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6728836 + 3222025 = 2594^2 + 1795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9950861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9950867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4975430 + 4975431.

It is an arithmetic number, because the mean of its divisors is an integer number (4975431).

Almost surely, 2^9950861 is an apocalyptic number.

It is an amenable number.

9950861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9950861 is an equidigital number, since it uses as much as digits as its factorization.

9950861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9950861 is about 3154.4985338402. The cubic root of 9950861 is about 215.0900001785.

The spelling of 9950861 in words is "nine million, nine hundred fifty thousand, eight hundred sixty-one".