129199 has 4 divisors (see below), whose sum is σ = 147664. Its totient is φ = 110736.

The previous prime is 129197. The next prime is 129209. The reversal of 129199 is 991921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129199 - 2¹ = 129197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129193) 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, 9222 + ... + 9235.

It is an arithmetic number, because the mean of its divisors is an integer number (36916).

2¹²⁹¹⁹⁹ is an apocalyptic number.

129199 is a deficient number, since it is larger than the sum of its proper divisors (18465).

129199 is an equidigital number, since it uses as much as digits as its factorization.

129199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18464.

The product of its digits is 1458, while the sum is 31.

The square root of 129199 is about 359.4426240723. The cubic root of 129199 is about 50.5537120896.

The spelling of 129199 in words is "one hundred twenty-nine thousand, one hundred ninety-nine".