129776612 has 72 divisors (see below), whose sum is σ = 282147264. Its totient is φ = 51119424.

The previous prime is 129776597. The next prime is 129776627. The reversal of 129776612 is 216677921.

It is an interprime number because it is at equal distance from previous prime (129776597) and next prime (129776627).

It is a self number, because there is not a number n which added to its sum of digits gives 129776612.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 373823 + ... + 374169.

It is an arithmetic number, because the mean of its divisors is an integer number (3918712).

Almost surely, 2^129776612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129776612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141073632).

129776612 is an abundant number, since it is smaller than the sum of its proper divisors (152370652).

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

129776612 is a wasteful number, since it uses less digits than its factorization.

129776612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 412 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The square root of 129776612 is about 11391.9538271536. The cubic root of 129776612 is about 506.2893718909.

The spelling of 129776612 in words is "one hundred twenty-nine million, seven hundred seventy-six thousand, six hundred twelve".