129397193 has 4 divisors (see below), whose sum is σ = 133571328. Its totient is φ = 125223060.

The previous prime is 129397153. The next prime is 129397231. The reversal of 129397193 is 391793921.

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 129397193 - 2⁶ = 129397129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129397153) 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, 2087021 + ... + 2087082.

It is an arithmetic number, because the mean of its divisors is an integer number (33392832).

Almost surely, 2^129397193 is an apocalyptic number.

It is an amenable number.

129397193 is a deficient number, since it is larger than the sum of its proper divisors (4174135).

129397193 is an equidigital number, since it uses as much as digits as its factorization.

129397193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174134.

The product of its digits is 91854, while the sum is 44.

The square root of 129397193 is about 11375.2886996331. The cubic root of 129397193 is about 505.7954890701.

The spelling of 129397193 in words is "one hundred twenty-nine million, three hundred ninety-seven thousand, one hundred ninety-three".