129765076877 has 2 divisors, whose sum is σ = 129765076878. Its totient is φ = 129765076876.

The previous prime is 129765076799. The next prime is 129765076907. The reversal of 129765076877 is 778670567921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105959364196 + 23805712681 = 325514^2 + 154291^2 .

It is an emirp because it is prime and its reverse (778670567921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129765076877 - 2¹⁸ = 129764814733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129765576877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64882538438 + 64882538439.

It is an arithmetic number, because the mean of its divisors is an integer number (64882538439).

Almost surely, 2^129765076877 is an apocalyptic number.

It is an amenable number.

129765076877 is a deficient number, since it is larger than the sum of its proper divisors (1).

129765076877 is an equidigital number, since it uses as much as digits as its factorization.

129765076877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62233920, while the sum is 65.

It can be divided in two parts, 12976507687 and 7, that multiplied together give a palindrome (90835553809).

The spelling of 129765076877 in words is "one hundred twenty-nine billion, seven hundred sixty-five million, seventy-six thousand, eight hundred seventy-seven".