129651317 has 2 divisors, whose sum is σ = 129651318. Its totient is φ = 129651316.

The previous prime is 129651283. The next prime is 129651329. The reversal of 129651317 is 713156921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 61324561 = 8266^2 + 7831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129651317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129651337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64825658 + 64825659.

It is an arithmetic number, because the mean of its divisors is an integer number (64825659).

Almost surely, 2^129651317 is an apocalyptic number.

It is an amenable number.

129651317 is a deficient number, since it is larger than the sum of its proper divisors (1).

129651317 is an equidigital number, since it uses as much as digits as its factorization.

129651317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 129651317 is about 11386.4532230190. The cubic root of 129651317 is about 506.1263842467.

The spelling of 129651317 in words is "one hundred twenty-nine million, six hundred fifty-one thousand, three hundred seventeen".