12705839077 has 2 divisors, whose sum is σ = 12705839078. Its totient is φ = 12705839076.

The previous prime is 12705838967. The next prime is 12705839099. The reversal of 12705839077 is 77093850721.

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., 11457347521 + 1248491556 = 107039^2 + 35334^2 .

It is a cyclic number.

It is not a de Polignac number, because 12705839077 - 2⁷ = 12705838949 is a prime.

It is a super-2 number, since 2×12705839077² (a number of 21 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 12705839077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12705839677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352919538 + 6352919539.

It is an arithmetic number, because the mean of its divisors is an integer number (6352919539).

Almost surely, 2^12705839077 is an apocalyptic number.

It is an amenable number.

12705839077 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705839077 is an equidigital number, since it uses as much as digits as its factorization.

12705839077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 12705839077 in words is "twelve billion, seven hundred five million, eight hundred thirty-nine thousand, seventy-seven".