129667973 has 2 divisors, whose sum is σ = 129667974. Its totient is φ = 129667972.

The previous prime is 129667949. The next prime is 129667999. The reversal of 129667973 is 379766921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90003169 + 39664804 = 9487^2 + 6298^2 .

It is a cyclic number.

It is not a de Polignac number, because 129667973 - 2⁸ = 129667717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129667933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64833986 + 64833987.

It is an arithmetic number, because the mean of its divisors is an integer number (64833987).

Almost surely, 2^129667973 is an apocalyptic number.

It is an amenable number.

129667973 is a deficient number, since it is larger than the sum of its proper divisors (1).

129667973 is an equidigital number, since it uses as much as digits as its factorization.

129667973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 50.

The square root of 129667973 is about 11387.1845949734. The cubic root of 129667973 is about 506.1480569411.

The spelling of 129667973 in words is "one hundred twenty-nine million, six hundred sixty-seven thousand, nine hundred seventy-three".