129023 has 2 divisors, whose sum is σ = 129024. Its totient is φ = 129022.

The previous prime is 129011. The next prime is 129037. The reversal of 129023 is 320921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129023 - 2⁶ = 128959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128992 and 129010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64511 + 64512.

It is an arithmetic number, because the mean of its divisors is an integer number (64512).

2¹²⁹⁰²³ is an apocalyptic number.

129023 is a deficient number, since it is larger than the sum of its proper divisors (1).

129023 is an equidigital number, since it uses as much as digits as its factorization.

129023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 129023 is about 359.1977171420. The cubic root of 129023 is about 50.5307462345.

Adding to 129023 its reverse (320921), we get a palindrome (449944).

The spelling of 129023 in words is "one hundred twenty-nine thousand, twenty-three".