863339728417 has 2 divisors, whose sum is σ = 863339728418. Its totient is φ = 863339728416.

The previous prime is 863339728379. The next prime is 863339728423. The reversal of 863339728417 is 714827933368.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843956406241 + 19383322176 = 918671^2 + 139224^2 .

It is a cyclic number.

It is not a de Polignac number, because 863339728417 - 2³¹ = 861192244769 is a prime.

It is not a weakly prime, because it can be changed into another prime (863339728457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431669864208 + 431669864209.

It is an arithmetic number, because the mean of its divisors is an integer number (431669864209).

Almost surely, 2^863339728417 is an apocalyptic number.

It is an amenable number.

863339728417 is a deficient number, since it is larger than the sum of its proper divisors (1).

863339728417 is an equidigital number, since it uses as much as digits as its factorization.

863339728417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 61.

The spelling of 863339728417 in words is "eight hundred sixty-three billion, three hundred thirty-nine million, seven hundred twenty-eight thousand, four hundred seventeen".