129072023 has 8 divisors (see below), whose sum is σ = 130534800. Its totient is φ = 127614528.

The previous prime is 129071993. The next prime is 129072029. The reversal of 129072023 is 320270921.

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

It is a cyclic number.

It is not a de Polignac number, because 129072023 - 2¹⁰ = 129070999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129071983 and 129072001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129072029) 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, 66515 + ... + 68427.

It is an arithmetic number, because the mean of its divisors is an integer number (16316850).

Almost surely, 2^129072023 is an apocalyptic number.

129072023 is a deficient number, since it is larger than the sum of its proper divisors (1462777).

129072023 is a wasteful number, since it uses less digits than its factorization.

129072023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 129072023 is about 11360.9868849497. The cubic root of 129072023 is about 505.3714523593.

The spelling of 129072023 in words is "one hundred twenty-nine million, seventy-two thousand, twenty-three".