129894423 has 8 divisors (see below), whose sum is σ = 173292528. Its totient is φ = 86546304.

The previous prime is 129894403. The next prime is 129894439. The reversal of 129894423 is 324498921.

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

It is not a de Polignac number, because 129894423 - 2¹³ = 129886231 is a prime.

It is a super-2 number, since 2×129894423² = 33745122253005858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129894403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5940 + ... + 17177.

It is an arithmetic number, because the mean of its divisors is an integer number (21661566).

Almost surely, 2^129894423 is an apocalyptic number.

129894423 is a deficient number, since it is larger than the sum of its proper divisors (43398105).

129894423 is a wasteful number, since it uses less digits than its factorization.

129894423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24993.

The product of its digits is 124416, while the sum is 42.

The square root of 129894423 is about 11397.1234528718. The cubic root of 129894423 is about 506.4425284481.

The spelling of 129894423 in words is "one hundred twenty-nine million, eight hundred ninety-four thousand, four hundred twenty-three".