129444223 has 4 divisors (see below), whose sum is σ = 129473640. Its totient is φ = 129414808.

The previous prime is 129444199. The next prime is 129444229. The reversal of 129444223 is 322444921.

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 129444223 - 2¹³ = 129436031 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 (129444229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6628 + ... + 17401.

It is an arithmetic number, because the mean of its divisors is an integer number (32368410).

Almost surely, 2^129444223 is an apocalyptic number.

129444223 is a deficient number, since it is larger than the sum of its proper divisors (29417).

129444223 is an equidigital number, since it uses as much as digits as its factorization.

129444223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29416.

The product of its digits is 13824, while the sum is 31.

The square root of 129444223 is about 11377.3557121152. The cubic root of 129444223 is about 505.8567595402.

The spelling of 129444223 in words is "one hundred twenty-nine million, four hundred forty-four thousand, two hundred twenty-three".