839699085481 has 2 divisors, whose sum is σ = 839699085482. Its totient is φ = 839699085480.

The previous prime is 839699085443. The next prime is 839699085499. The reversal of 839699085481 is 184580996938.

839699085481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 656600675481 + 183098410000 = 810309^2 + 427900^2 .

It is a cyclic number.

It is not a de Polignac number, because 839699085481 - 2¹⁹ = 839698561193 is a prime.

It is a super-2 number, since 2×839699085481² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 839699085481.

It is not a weakly prime, because it can be changed into another prime (839699025481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419849542740 + 419849542741.

It is an arithmetic number, because the mean of its divisors is an integer number (419849542741).

Almost surely, 2^839699085481 is an apocalyptic number.

It is an amenable number.

839699085481 is a deficient number, since it is larger than the sum of its proper divisors (1).

839699085481 is an equidigital number, since it uses as much as digits as its factorization.

839699085481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134369280, while the sum is 70.

The spelling of 839699085481 in words is "eight hundred thirty-nine billion, six hundred ninety-nine million, eighty-five thousand, four hundred eighty-one".