129699223 has 8 divisors (see below), whose sum is σ = 137293200. Its totient is φ = 122313408.

The previous prime is 129699221. The next prime is 129699233. The reversal of 129699223 is 322996921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129699223 - 2¹ = 129699221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 129699223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129699221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50758 + ... + 53251.

It is an arithmetic number, because the mean of its divisors is an integer number (17161650).

Almost surely, 2^129699223 is an apocalyptic number.

129699223 is a deficient number, since it is larger than the sum of its proper divisors (7593977).

129699223 is a wasteful number, since it uses less digits than its factorization.

129699223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104081.

The product of its digits is 104976, while the sum is 43.

The square root of 129699223 is about 11388.5566688672. The cubic root of 129699223 is about 506.1887142598.

The spelling of 129699223 in words is "one hundred twenty-nine million, six hundred ninety-nine thousand, two hundred twenty-three".