129030023 has 8 divisors (see below), whose sum is σ = 134786400. Its totient is φ = 123285888.

The previous prime is 129030001. The next prime is 129030047. The reversal of 129030023 is 320030921.

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

It is not a de Polignac number, because 129030023 - 2¹⁴ = 129013639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129029977 and 129030004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129030053) 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, 23483 + ... + 28451.

It is an arithmetic number, because the mean of its divisors is an integer number (16848300).

Almost surely, 2^129030023 is an apocalyptic number.

129030023 is a deficient number, since it is larger than the sum of its proper divisors (5756377).

129030023 is a wasteful number, since it uses less digits than its factorization.

129030023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6121.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 129030023 is about 11359.1383035862. The cubic root of 129030023 is about 505.3166305030.

Adding to 129030023 its reverse (320030921), we get a palindrome (449060944).

It can be divided in two parts, 1290 and 30023, that added together give a palindrome (31313).

The spelling of 129030023 in words is "one hundred twenty-nine million, thirty thousand, twenty-three".