129818194 has 8 divisors (see below), whose sum is σ = 212429808. Its totient is φ = 59008260.

The previous prime is 129818189. The next prime is 129818197. The reversal of 129818194 is 491818921.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 129818194.

It is not an unprimeable number, because it can be changed into a prime (129818197) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2950392 + ... + 2950435.

It is an arithmetic number, because the mean of its divisors is an integer number (26553726).

Almost surely, 2^129818194 is an apocalyptic number.

129818194 is a deficient number, since it is larger than the sum of its proper divisors (82611614).

129818194 is a wasteful number, since it uses less digits than its factorization.

129818194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5900840.

The product of its digits is 41472, while the sum is 43.

The square root of 129818194 is about 11393.7787410499. The cubic root of 129818194 is about 506.3434398678.

The spelling of 129818194 in words is "one hundred twenty-nine million, eight hundred eighteen thousand, one hundred ninety-four".