129399527 has 2 divisors, whose sum is σ = 129399528. Its totient is φ = 129399526.

The previous prime is 129399499. The next prime is 129399533. The reversal of 129399527 is 725993921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129399527 - 2⁶ = 129399463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129399547) 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, 64699763 + 64699764.

It is an arithmetic number, because the mean of its divisors is an integer number (64699764).

Almost surely, 2^129399527 is an apocalyptic number.

129399527 is a deficient number, since it is larger than the sum of its proper divisors (1).

129399527 is an equidigital number, since it uses as much as digits as its factorization.

129399527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 47.

The square root of 129399527 is about 11375.3912899733. The cubic root of 129399527 is about 505.7985301447.

The spelling of 129399527 in words is "one hundred twenty-nine million, three hundred ninety-nine thousand, five hundred twenty-seven".