129930989 has 2 divisors, whose sum is σ = 129930990. Its totient is φ = 129930988.

The previous prime is 129930973. The next prime is 129931003. The reversal of 129930989 is 989039921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93122500 + 36808489 = 9650^2 + 6067^2 .

It is a cyclic number.

It is not a de Polignac number, because 129930989 - 2⁴ = 129930973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129930929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64965494 + 64965495.

It is an arithmetic number, because the mean of its divisors is an integer number (64965495).

Almost surely, 2^129930989 is an apocalyptic number.

It is an amenable number.

129930989 is a deficient number, since it is larger than the sum of its proper divisors (1).

129930989 is an equidigital number, since it uses as much as digits as its factorization.

129930989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 50.

The square root of 129930989 is about 11398.7275167012. The cubic root of 129930989 is about 506.4900461158.

The spelling of 129930989 in words is "one hundred twenty-nine million, nine hundred thirty thousand, nine hundred eighty-nine".