129017197 has 4 divisors (see below), whose sum is σ = 129119040. Its totient is φ = 128915356.

The previous prime is 129017183. The next prime is 129017227. The reversal of 129017197 is 791710921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129017197 - 2¹⁹ = 128492909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129017107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48997 + ... + 51562.

It is an arithmetic number, because the mean of its divisors is an integer number (32279760).

Almost surely, 2^129017197 is an apocalyptic number.

It is an amenable number.

129017197 is a deficient number, since it is larger than the sum of its proper divisors (101843).

129017197 is a wasteful number, since it uses less digits than its factorization.

129017197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101842.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 129017197 is about 11358.5737220832. The cubic root of 129017197 is about 505.2998865812.

The spelling of 129017197 in words is "one hundred twenty-nine million, seventeen thousand, one hundred ninety-seven".