123429129 has 8 divisors (see below), whose sum is σ = 174252960. Its totient is φ = 77445696.

The previous prime is 123429113. The next prime is 123429143. The reversal of 123429129 is 921924321.

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

It is not a de Polignac number, because 123429129 - 2⁴ = 123429113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123429129.

It is not an unprimeable number, because it can be changed into a prime (123429179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1210039 + ... + 1210140.

It is an arithmetic number, because the mean of its divisors is an integer number (21781620).

Almost surely, 2^123429129 is an apocalyptic number.

It is an amenable number.

123429129 is a deficient number, since it is larger than the sum of its proper divisors (50823831).

123429129 is a wasteful number, since it uses less digits than its factorization.

123429129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420199.

The product of its digits is 7776, while the sum is 33.

The square root of 123429129 is about 11109.8662908246. The cubic root of 123429129 is about 497.8966697438.

The spelling of 123429129 in words is "one hundred twenty-three million, four hundred twenty-nine thousand, one hundred twenty-nine".