129312790 has 16 divisors (see below), whose sum is σ = 234193968. Its totient is φ = 51407136.

The previous prime is 129312731. The next prime is 129312791. The reversal of 129312790 is 97213921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38037 + ... + 41296.

It is an arithmetic number, because the mean of its divisors is an integer number (14637123).

Almost surely, 2^129312790 is an apocalyptic number.

129312790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129312790 is a deficient number, since it is larger than the sum of its proper divisors (104881178).

129312790 is a wasteful number, since it uses less digits than its factorization.

129312790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79503.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 129312790 is about 11371.5781666398. The cubic root of 129312790 is about 505.6854919851.

The spelling of 129312790 in words is "one hundred twenty-nine million, three hundred twelve thousand, seven hundred ninety".