129534238 has 4 divisors (see below), whose sum is σ = 194301360. Its totient is φ = 64767118.

The previous prime is 129534227. The next prime is 129534247. The reversal of 129534238 is 832435921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832435921 = 809 ⋅1028969.

It is a junction number, because it is equal to n+sod(n) for n = 129534197 and 129534206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32383558 + ... + 32383561.

It is an arithmetic number, because the mean of its divisors is an integer number (48575340).

Almost surely, 2^129534238 is an apocalyptic number.

129534238 is a deficient number, since it is larger than the sum of its proper divisors (64767122).

129534238 is an equidigital number, since it uses as much as digits as its factorization.

129534238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64767121.

The product of its digits is 51840, while the sum is 37.

The square root of 129534238 is about 11381.3109086783. The cubic root of 129534238 is about 505.9739892997.

The spelling of 129534238 in words is "one hundred twenty-nine million, five hundred thirty-four thousand, two hundred thirty-eight".