129479418 has 32 divisors (see below), whose sum is σ = 288129600. Its totient is φ = 43100208.

The previous prime is 129479401. The next prime is 129479437. The reversal of 129479418 is 814974921.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56605 + ... + 58847.

It is an arithmetic number, because the mean of its divisors is an integer number (9004050).

Almost surely, 2^129479418 is an apocalyptic number.

129479418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129479418 is an abundant number, since it is smaller than the sum of its proper divisors (158650182).

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

129479418 is a wasteful number, since it uses less digits than its factorization.

129479418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323 (or 3317 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 129479418 is about 11378.9023196440. The cubic root of 129479418 is about 505.9026017182.

The spelling of 129479418 in words is "one hundred twenty-nine million, four hundred seventy-nine thousand, four hundred eighteen".