129873427 has 2 divisors, whose sum is σ = 129873428. Its totient is φ = 129873426.

The previous prime is 129873407. The next prime is 129873431. The reversal of 129873427 is 724378921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129873427 - 2⁷ = 129873299 is a prime.

It is not a weakly prime, because it can be changed into another prime (129873407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64936713 + 64936714.

It is an arithmetic number, because the mean of its divisors is an integer number (64936714).

Almost surely, 2^129873427 is an apocalyptic number.

129873427 is a deficient number, since it is larger than the sum of its proper divisors (1).

129873427 is an equidigital number, since it uses as much as digits as its factorization.

129873427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 129873427 is about 11396.2023060316. The cubic root of 129873427 is about 506.4152400292.

The spelling of 129873427 in words is "one hundred twenty-nine million, eight hundred seventy-three thousand, four hundred twenty-seven".