129930247 has 2 divisors, whose sum is σ = 129930248. Its totient is φ = 129930246.

The previous prime is 129930223. The next prime is 129930263. The reversal of 129930247 is 742039921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129930247 - 2¹⁵ = 129897479 is a prime.

It is equal to p_7374475 and since 129930247 and 7374475 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129930547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64965123 + 64965124.

It is an arithmetic number, because the mean of its divisors is an integer number (64965124).

Almost surely, 2^129930247 is an apocalyptic number.

129930247 is a deficient number, since it is larger than the sum of its proper divisors (1).

129930247 is an equidigital number, since it uses as much as digits as its factorization.

129930247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 129930247 is about 11398.6949691620. The cubic root of 129930247 is about 506.4890819724.

The spelling of 129930247 in words is "one hundred twenty-nine million, nine hundred thirty thousand, two hundred forty-seven".