129312998 has 8 divisors (see below), whose sum is σ = 195853008. Its totient is φ = 64028664.

The previous prime is 129312991. The next prime is 129313007. The reversal of 129312998 is 899213921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313661 + ... + 314072.

It is an arithmetic number, because the mean of its divisors is an integer number (24481626).

Almost surely, 2^129312998 is an apocalyptic number.

129312998 is a deficient number, since it is larger than the sum of its proper divisors (66540010).

129312998 is a wasteful number, since it uses less digits than its factorization.

129312998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627838.

The product of its digits is 69984, while the sum is 44.

The square root of 129312998 is about 11371.5873122445. The cubic root of 129312998 is about 505.6857631172.

The spelling of 129312998 in words is "one hundred twenty-nine million, three hundred twelve thousand, nine hundred ninety-eight".