9893861 has 2 divisors, whose sum is σ = 9893862. Its totient is φ = 9893860.

The previous prime is 9893857. The next prime is 9893869. The reversal of 9893861 is 1683989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9302500 + 591361 = 3050^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 9893861 - 2² = 9893857 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 (9893869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4946930 + 4946931.

It is an arithmetic number, because the mean of its divisors is an integer number (4946931).

Almost surely, 2^9893861 is an apocalyptic number.

It is an amenable number.

9893861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9893861 is an equidigital number, since it uses as much as digits as its factorization.

9893861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 9893861 is about 3145.4508420893. The cubic root of 9893861 is about 214.6785244255.

The spelling of 9893861 in words is "nine million, eight hundred ninety-three thousand, eight hundred sixty-one".