129949930 has 64 divisors (see below), whose sum is σ = 271797120. Its totient is φ = 44236800.

The previous prime is 129949889. The next prime is 129949961. The reversal of 129949930 is 39949921.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202410 + ... + 203050.

It is an arithmetic number, because the mean of its divisors is an integer number (4246830).

Almost surely, 2^129949930 is an apocalyptic number.

129949930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129949930 is an abundant number, since it is smaller than the sum of its proper divisors (141847190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129949930 is a wasteful number, since it uses less digits than its factorization.

129949930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 129949930 is about 11399.5583247773. The cubic root of 129949930 is about 506.5146565184.

Subtracting from 129949930 its reverse (39949921), we obtain a palindrome (90000009).

It can be divided in two parts, 129 and 949930, that added together give a palindrome (950059).

The spelling of 129949930 in words is "one hundred twenty-nine million, nine hundred forty-nine thousand, nine hundred thirty".