861241727 has 2 divisors, whose sum is σ = 861241728. Its totient is φ = 861241726.

The previous prime is 861241699. The next prime is 861241741. The reversal of 861241727 is 727142168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861241727 - 2²⁸ = 592806271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861241027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430620863 + 430620864.

It is an arithmetic number, because the mean of its divisors is an integer number (430620864).

Almost surely, 2^861241727 is an apocalyptic number.

861241727 is a deficient number, since it is larger than the sum of its proper divisors (1).

861241727 is an equidigital number, since it uses as much as digits as its factorization.

861241727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 861241727 is about 29346.9202302388. The cubic root of 861241727 is about 951.4260124073.

The spelling of 861241727 in words is "eight hundred sixty-one million, two hundred forty-one thousand, seven hundred twenty-seven".