129140197 has 2 divisors, whose sum is σ = 129140198. Its totient is φ = 129140196.

The previous prime is 129140153. The next prime is 129140213. The reversal of 129140197 is 791041921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107619876 + 21520321 = 10374^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 129140197 - 2⁷ = 129140069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129140107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64570098 + 64570099.

It is an arithmetic number, because the mean of its divisors is an integer number (64570099).

Almost surely, 2^129140197 is an apocalyptic number.

It is an amenable number.

129140197 is a deficient number, since it is larger than the sum of its proper divisors (1).

129140197 is an equidigital number, since it uses as much as digits as its factorization.

129140197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 129140197 is about 11363.9868444134. The cubic root of 129140197 is about 505.4604133608.

Subtracting from 129140197 its sum of digits (34), we obtain a 17-th power (129140163 = 3¹⁷).

The spelling of 129140197 in words is "one hundred twenty-nine million, one hundred forty thousand, one hundred ninety-seven".