129574009 has 2 divisors, whose sum is σ = 129574010. Its totient is φ = 129574008.

The previous prime is 129573991. The next prime is 129574013. The reversal of 129574009 is 900475921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 50808384 = 8875^2 + 7128^2 .

It is a cyclic number.

It is not a de Polignac number, because 129574009 - 2⁹ = 129573497 is a prime.

It is not a weakly prime, because it can be changed into another prime (129574909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64787004 + 64787005.

It is an arithmetic number, because the mean of its divisors is an integer number (64787005).

Almost surely, 2^129574009 is an apocalyptic number.

It is an amenable number.

129574009 is a deficient number, since it is larger than the sum of its proper divisors (1).

129574009 is an equidigital number, since it uses as much as digits as its factorization.

129574009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 129574009 is about 11383.0579810524. The cubic root of 129574009 is about 506.0257671995.

The spelling of 129574009 in words is "one hundred twenty-nine million, five hundred seventy-four thousand, nine".