9861239 has 2 divisors, whose sum is σ = 9861240. Its totient is φ = 9861238.

The previous prime is 9861223. The next prime is 9861253. The reversal of 9861239 is 9321689.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9861239 - 2⁴ = 9861223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9867239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4930619 + 4930620.

It is an arithmetic number, because the mean of its divisors is an integer number (4930620).

Almost surely, 2^9861239 is an apocalyptic number.

9861239 is a deficient number, since it is larger than the sum of its proper divisors (1).

9861239 is an equidigital number, since it uses as much as digits as its factorization.

9861239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 9861239 is about 3140.2609764158. The cubic root of 9861239 is about 214.4423188978.

The spelling of 9861239 in words is "nine million, eight hundred sixty-one thousand, two hundred thirty-nine".