129897043 has 2 divisors, whose sum is σ = 129897044. Its totient is φ = 129897042.

The previous prime is 129897041. The next prime is 129897067. The reversal of 129897043 is 340798921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129897043 - 2¹ = 129897041 is a prime.

Together with 129897041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (129897041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64948521 + 64948522.

It is an arithmetic number, because the mean of its divisors is an integer number (64948522).

Almost surely, 2^129897043 is an apocalyptic number.

129897043 is a deficient number, since it is larger than the sum of its proper divisors (1).

129897043 is an equidigital number, since it uses as much as digits as its factorization.

129897043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 129897043 is about 11397.2383935759. The cubic root of 129897043 is about 506.4459334455.

The spelling of 129897043 in words is "one hundred twenty-nine million, eight hundred ninety-seven thousand, forty-three".