129345423 has 32 divisors (see below), whose sum is σ = 185856000. Its totient is φ = 79833600.

The previous prime is 129345421. The next prime is 129345479. The reversal of 129345423 is 324543921.

It is not a de Polignac number, because 129345423 - 2¹ = 129345421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129345421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536583 + ... + 536823.

It is an arithmetic number, because the mean of its divisors is an integer number (5808000).

Almost surely, 2^129345423 is an apocalyptic number.

129345423 is a deficient number, since it is larger than the sum of its proper divisors (56510577).

129345423 is a wasteful number, since it uses less digits than its factorization.

129345423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its digits is 25920, while the sum is 33.

The square root of 129345423 is about 11373.0129253422. The cubic root of 129345423 is about 505.7280261812.

The spelling of 129345423 in words is "one hundred twenty-nine million, three hundred forty-five thousand, four hundred twenty-three".