129889443 has 4 divisors (see below), whose sum is σ = 173185928. Its totient is φ = 86592960.

The previous prime is 129889433. The next prime is 129889477. The reversal of 129889443 is 344988921.

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

It is not a de Polignac number, because 129889443 - 2⁹ = 129888931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129889392 and 129889401.

It is not an unprimeable number, because it can be changed into a prime (129889423) 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, 21648238 + ... + 21648243.

It is an arithmetic number, because the mean of its divisors is an integer number (43296482).

Almost surely, 2^129889443 is an apocalyptic number.

129889443 is a deficient number, since it is larger than the sum of its proper divisors (43296485).

129889443 is an equidigital number, since it uses as much as digits as its factorization.

129889443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43296484.

The product of its digits is 497664, while the sum is 48.

The square root of 129889443 is about 11396.9049745973. The cubic root of 129889443 is about 506.4360562277.

The spelling of 129889443 in words is "one hundred twenty-nine million, eight hundred eighty-nine thousand, four hundred forty-three".