129320049 has 8 divisors (see below), whose sum is σ = 176436832. Its totient is φ = 84208320.

The previous prime is 129320047. The next prime is 129320063. The reversal of 129320049 is 940023921.

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

It is not a de Polignac number, because 129320049 - 2¹ = 129320047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129319998 and 129320025.

It is not an unprimeable number, because it can be changed into a prime (129320047) 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, 501112 + ... + 501369.

It is an arithmetic number, because the mean of its divisors is an integer number (22054604).

Almost surely, 2^129320049 is an apocalyptic number.

It is an amenable number.

129320049 is a deficient number, since it is larger than the sum of its proper divisors (47116783).

129320049 is a wasteful number, since it uses less digits than its factorization.

129320049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002527.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 129320049 is about 11371.8973350976. The cubic root of 129320049 is about 505.6949540610.

The spelling of 129320049 in words is "one hundred twenty-nine million, three hundred twenty thousand, forty-nine".