873839062781 has 2 divisors, whose sum is σ = 873839062782. Its totient is φ = 873839062780.

The previous prime is 873839062777. The next prime is 873839062829. The reversal of 873839062781 is 187260938378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636532708900 + 237306353881 = 797830^2 + 487141^2 .

It is a cyclic number.

It is not a de Polignac number, because 873839062781 - 2² = 873839062777 is a prime.

It is a super-2 number, since 2×873839062781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873839062981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436919531390 + 436919531391.

It is an arithmetic number, because the mean of its divisors is an integer number (436919531391).

Almost surely, 2^873839062781 is an apocalyptic number.

It is an amenable number.

873839062781 is a deficient number, since it is larger than the sum of its proper divisors (1).

873839062781 is an equidigital number, since it uses as much as digits as its factorization.

873839062781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 873839062781 in words is "eight hundred seventy-three billion, eight hundred thirty-nine million, sixty-two thousand, seven hundred eighty-one".