129383447 has 8 divisors (see below), whose sum is σ = 137214000. Its totient is φ = 121577344.

The previous prime is 129383411. The next prime is 129383453. The reversal of 129383447 is 744383921.

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

It is a cyclic number.

It is not a de Polignac number, because 129383447 - 2⁶ = 129383383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129383467) 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, 5429 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (17151750).

Almost surely, 2^129383447 is an apocalyptic number.

129383447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129383447 is a deficient number, since it is larger than the sum of its proper divisors (7830553).

129383447 is a wasteful number, since it uses less digits than its factorization.

129383447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12225.

The product of its digits is 145152, while the sum is 41.

The square root of 129383447 is about 11374.6844791405. The cubic root of 129383447 is about 505.7775780401. Note that the first 3 decimals are identical.

The spelling of 129383447 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, four hundred forty-seven".