129320284 has 6 divisors (see below), whose sum is σ = 226310504. Its totient is φ = 64660140.

The previous prime is 129320281. The next prime is 129320287. The reversal of 129320284 is 482023921.

It is an interprime number because it is at equal distance from previous prime (129320281) and next prime (129320287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129320281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16165032 + ... + 16165039.

Almost surely, 2^129320284 is an apocalyptic number.

It is an amenable number.

129320284 is a deficient number, since it is larger than the sum of its proper divisors (96990220).

129320284 is a wasteful number, since it uses less digits than its factorization.

129320284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32330075 (or 32330073 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 129320284 is about 11371.9076675815. The cubic root of 129320284 is about 505.6952603766.

The spelling of 129320284 in words is "one hundred twenty-nine million, three hundred twenty thousand, two hundred eighty-four".