129313780 has 24 divisors (see below), whose sum is σ = 274101408. Its totient is φ = 51241248.

The previous prime is 129313739. The next prime is 129313787. The reversal of 129313780 is 87313921.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129313787) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28074 + ... + 32353.

It is an arithmetic number, because the mean of its divisors is an integer number (11420892).

Almost surely, 2^129313780 is an apocalyptic number.

129313780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129313780 is an abundant number, since it is smaller than the sum of its proper divisors (144787628).

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

129313780 is a wasteful number, since it uses less digits than its factorization.

129313780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60543 (or 60541 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 129313780 is about 11371.6216961346. The cubic root of 129313780 is about 505.6867824668.

The spelling of 129313780 in words is "one hundred twenty-nine million, three hundred thirteen thousand, seven hundred eighty".