129547427 has 2 divisors, whose sum is σ = 129547428. Its totient is φ = 129547426.

The previous prime is 129547403. The next prime is 129547489. The reversal of 129547427 is 724745921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129547427 - 2²⁴ = 112770211 is a prime.

It is not a weakly prime, because it can be changed into another prime (129547927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64773713 + 64773714.

It is an arithmetic number, because the mean of its divisors is an integer number (64773714).

Almost surely, 2^129547427 is an apocalyptic number.

129547427 is a deficient number, since it is larger than the sum of its proper divisors (1).

129547427 is an equidigital number, since it uses as much as digits as its factorization.

129547427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 129547427 is about 11381.8903087317. The cubic root of 129547427 is about 505.9911612448.

The spelling of 129547427 in words is "one hundred twenty-nine million, five hundred forty-seven thousand, four hundred twenty-seven".