129141889 has 4 divisors (see below), whose sum is σ = 129711024. Its totient is φ = 128572756.

The previous prime is 129141869. The next prime is 129141907. The reversal of 129141889 is 988141921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988141921 = 13 ⋅76010917.

It is a cyclic number.

It is not a de Polignac number, because 129141889 - 2⁹ = 129141377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129141869) 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, 284227 + ... + 284680.

It is an arithmetic number, because the mean of its divisors is an integer number (32427756).

Almost surely, 2^129141889 is an apocalyptic number.

It is an amenable number.

129141889 is a deficient number, since it is larger than the sum of its proper divisors (569135).

129141889 is an equidigital number, since it uses as much as digits as its factorization.

129141889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569134.

The product of its digits is 41472, while the sum is 43.

The square root of 129141889 is about 11364.0612898734. The cubic root of 129141889 is about 505.4626208720.

The spelling of 129141889 in words is "one hundred twenty-nine million, one hundred forty-one thousand, eight hundred eighty-nine".