129384623 has 4 divisors (see below), whose sum is σ = 136194360. Its totient is φ = 122574888.

The previous prime is 129384613. The next prime is 129384659. The reversal of 129384623 is 326483921.

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 129384623 - 2⁶ = 129384559 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 (129384613) 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, 3404840 + ... + 3404877.

It is an arithmetic number, because the mean of its divisors is an integer number (34048590).

Almost surely, 2^129384623 is an apocalyptic number.

129384623 is a deficient number, since it is larger than the sum of its proper divisors (6809737).

129384623 is an equidigital number, since it uses as much as digits as its factorization.

129384623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809736.

The product of its digits is 62208, while the sum is 38.

The square root of 129384623 is about 11374.7361727646. The cubic root of 129384623 is about 505.7791104170.

The spelling of 129384623 in words is "one hundred twenty-nine million, three hundred eighty-four thousand, six hundred twenty-three".