129549830 has 16 divisors (see below), whose sum is σ = 234972144. Its totient is φ = 51423840.

The previous prime is 129549829. The next prime is 129549851. The reversal of 129549830 is 38945921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48137 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (14685759).

Almost surely, 2^129549830 is an apocalyptic number.

129549830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129549830 is a deficient number, since it is larger than the sum of its proper divisors (105422314).

129549830 is a wasteful number, since it uses less digits than its factorization.

129549830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99031.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 129549830 is about 11381.9958706722. The cubic root of 129549830 is about 505.9942898010.

The spelling of 129549830 in words is "one hundred twenty-nine million, five hundred forty-nine thousand, eight hundred thirty".