129779106 has 16 divisors (see below), whose sum is σ = 261940800. Its totient is φ = 42862608.

The previous prime is 129779099. The next prime is 129779119. The reversal of 129779106 is 601977921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98566 + ... + 99873.

It is an arithmetic number, because the mean of its divisors is an integer number (16371300).

Almost surely, 2^129779106 is an apocalyptic number.

129779106 is an abundant number, since it is smaller than the sum of its proper divisors (132161694).

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

129779106 is a wasteful number, since it uses less digits than its factorization.

129779106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198553.

The product of its (nonzero) digits is 47628, while the sum is 42.

The square root of 129779106 is about 11392.0632898523. The cubic root of 129779106 is about 506.2926150988.

The spelling of 129779106 in words is "one hundred twenty-nine million, seven hundred seventy-nine thousand, one hundred six".