129993854 has 8 divisors (see below), whose sum is σ = 195455208. Its totient is φ = 64842120.

The previous prime is 129993847. The next prime is 129993889. The reversal of 129993854 is 458399921.

It is a happy number.

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

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 76352 + ... + 78035.

It is an arithmetic number, because the mean of its divisors is an integer number (24431901).

Almost surely, 2^129993854 is an apocalyptic number.

129993854 is a deficient number, since it is larger than the sum of its proper divisors (65461354).

129993854 is a wasteful number, since it uses less digits than its factorization.

129993854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154810.

The product of its digits is 699840, while the sum is 50.

The square root of 129993854 is about 11401.4847278765. The cubic root of 129993854 is about 506.5717186077.

The spelling of 129993854 in words is "one hundred twenty-nine million, nine hundred ninety-three thousand, eight hundred fifty-four".