129906977 has 2 divisors, whose sum is σ = 129906978. Its totient is φ = 129906976.

The previous prime is 129906929. The next prime is 129907021. The reversal of 129906977 is 779609921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127599616 + 2307361 = 11296^2 + 1519^2 .

It is an emirp because it is prime and its reverse (779609921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129906977 - 2¹⁰ = 129905953 is a prime.

It is not a weakly prime, because it can be changed into another prime (129909977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64953488 + 64953489.

It is an arithmetic number, because the mean of its divisors is an integer number (64953489).

Almost surely, 2^129906977 is an apocalyptic number.

It is an amenable number.

129906977 is a deficient number, since it is larger than the sum of its proper divisors (1).

129906977 is an equidigital number, since it uses as much as digits as its factorization.

129906977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 129906977 is about 11397.6741925710. The cubic root of 129906977 is about 506.4588434280.

The spelling of 129906977 in words is "one hundred twenty-nine million, nine hundred six thousand, nine hundred seventy-seven".