129349047 has 8 divisors (see below), whose sum is σ = 173219440. Its totient is φ = 85855680.

The previous prime is 129349027. The next prime is 129349057. The reversal of 129349047 is 740943921.

129349047 is nontrivially palindromic in base 16.

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

It is not a de Polignac number, because 129349047 - 2²³ = 120960439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129348996 and 129349014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129349027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93454 + ... + 94827.

It is an arithmetic number, because the mean of its divisors is an integer number (21652430).

Almost surely, 2^129349047 is an apocalyptic number.

129349047 is a deficient number, since it is larger than the sum of its proper divisors (43870393).

129349047 is a wasteful number, since it uses less digits than its factorization.

129349047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188513.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 129349047 is about 11373.1722487616. The cubic root of 129349047 is about 505.7327492997.

The spelling of 129349047 in words is "one hundred twenty-nine million, three hundred forty-nine thousand, forty-seven".