129372977 has 2 divisors, whose sum is σ = 129372978. Its totient is φ = 129372976.

The previous prime is 129372959. The next prime is 129372989. The reversal of 129372977 is 779273921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 5740816 = 11119^2 + 2396^2 .

It is a cyclic number.

It is not a de Polignac number, because 129372977 - 2¹⁴ = 129356593 is a prime.

It is not a weakly prime, because it can be changed into another prime (129375977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64686488 + 64686489.

It is an arithmetic number, because the mean of its divisors is an integer number (64686489).

Almost surely, 2^129372977 is an apocalyptic number.

It is an amenable number.

129372977 is a deficient number, since it is larger than the sum of its proper divisors (1).

129372977 is an equidigital number, since it uses as much as digits as its factorization.

129372977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396, while the sum is 47.

The square root of 129372977 is about 11374.2242372832. The cubic root of 129372977 is about 505.7639347851.

The spelling of 129372977 in words is "one hundred twenty-nine million, three hundred seventy-two thousand, nine hundred seventy-seven".