129860827 has 2 divisors, whose sum is σ = 129860828. Its totient is φ = 129860826.

The previous prime is 129860821. The next prime is 129860837. The reversal of 129860827 is 728068921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129860827 - 2⁷ = 129860699 is a prime.

It is not a weakly prime, because it can be changed into another prime (129860821) 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, 64930413 + 64930414.

It is an arithmetic number, because the mean of its divisors is an integer number (64930414).

Almost surely, 2^129860827 is an apocalyptic number.

129860827 is a deficient number, since it is larger than the sum of its proper divisors (1).

129860827 is an equidigital number, since it uses as much as digits as its factorization.

129860827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 129860827 is about 11395.6494768837. The cubic root of 129860827 is about 506.3988624465.

The spelling of 129860827 in words is "one hundred twenty-nine million, eight hundred sixty thousand, eight hundred twenty-seven".