129338691 has 8 divisors (see below), whose sum is σ = 172506960. Its totient is φ = 86198112.

The previous prime is 129338663. The next prime is 129338701. The reversal of 129338691 is 196833921.

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

It is not a de Polignac number, because 129338691 - 2⁵ = 129338659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129338291) 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, 9645 + ... + 18753.

It is an arithmetic number, because the mean of its divisors is an integer number (21563370).

Almost surely, 2^129338691 is an apocalyptic number.

129338691 is a deficient number, since it is larger than the sum of its proper divisors (43168269).

129338691 is an equidigital number, since it uses as much as digits as its factorization.

129338691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13845.

The product of its digits is 69984, while the sum is 42.

The square root of 129338691 is about 11372.7169577019. The cubic root of 129338691 is about 505.7192522072.

The spelling of 129338691 in words is "one hundred twenty-nine million, three hundred thirty-eight thousand, six hundred ninety-one".