863909941 has 2 divisors, whose sum is σ = 863909942. Its totient is φ = 863909940.

The previous prime is 863909939. The next prime is 863909987. The reversal of 863909941 is 149909368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856732900 + 7177041 = 29270^2 + 2679^2 .

It is a cyclic number.

It is not a de Polignac number, because 863909941 - 2¹ = 863909939 is a prime.

Together with 863909939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863900941) 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, 431954970 + 431954971.

It is an arithmetic number, because the mean of its divisors is an integer number (431954971).

Almost surely, 2^863909941 is an apocalyptic number.

It is an amenable number.

863909941 is a deficient number, since it is larger than the sum of its proper divisors (1).

863909941 is an equidigital number, since it uses as much as digits as its factorization.

863909941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 863909941 is about 29392.3449387762. The cubic root of 863909941 is about 952.4075374960.

The spelling of 863909941 in words is "eight hundred sixty-three million, nine hundred nine thousand, nine hundred forty-one".