129779154 has 24 divisors (see below), whose sum is σ = 281400912. Its totient is φ = 43227000.

The previous prime is 129779131. The next prime is 129779159. The reversal of 129779154 is 451977921.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129779159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38917 + ... + 42119.

It is an arithmetic number, because the mean of its divisors is an integer number (11725038).

Almost surely, 2^129779154 is an apocalyptic number.

129779154 is an abundant number, since it is smaller than the sum of its proper divisors (151621758).

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

129779154 is a wasteful number, since it uses less digits than its factorization.

129779154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462 (or 5459 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 129779154 is about 11392.0653965820. The cubic root of 129779154 is about 506.2926775178.

The spelling of 129779154 in words is "one hundred twenty-nine million, seven hundred seventy-nine thousand, one hundred fifty-four".