861536341 has 2 divisors, whose sum is σ = 861536342. Its totient is φ = 861536340.

The previous prime is 861536339. The next prime is 861536383. The reversal of 861536341 is 143635168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 852056100 + 9480241 = 29190^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 861536341 - 2¹ = 861536339 is a prime.

Together with 861536339, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 861536341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861536441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430768170 + 430768171.

It is an arithmetic number, because the mean of its divisors is an integer number (430768171).

Almost surely, 2^861536341 is an apocalyptic number.

It is an amenable number.

861536341 is a deficient number, since it is larger than the sum of its proper divisors (1).

861536341 is an equidigital number, since it uses as much as digits as its factorization.

861536341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 861536341 is about 29351.9393056064. The cubic root of 861536341 is about 951.5344881342.

The spelling of 861536341 in words is "eight hundred sixty-one million, five hundred thirty-six thousand, three hundred forty-one".