129545023 has 2 divisors, whose sum is σ = 129545024. Its totient is φ = 129545022.

The previous prime is 129545011. The next prime is 129545047. The reversal of 129545023 is 320545921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129545023 - 2¹⁷ = 129413951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129545093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64772511 + 64772512.

It is an arithmetic number, because the mean of its divisors is an integer number (64772512).

Almost surely, 2^129545023 is an apocalyptic number.

129545023 is a deficient number, since it is larger than the sum of its proper divisors (1).

129545023 is an equidigital number, since it uses as much as digits as its factorization.

129545023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 129545023 is about 11381.7847018822. The cubic root of 129545023 is about 505.9880313479.

The spelling of 129545023 in words is "one hundred twenty-nine million, five hundred forty-five thousand, twenty-three".