129312837 has 12 divisors (see below), whose sum is σ = 189951840. Its totient is φ = 84747048.

The previous prime is 129312791. The next prime is 129312889. The reversal of 129312837 is 738213921.

It is not a de Polignac number, because 129312837 - 2⁷ = 129312709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129312037) 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 11 ways as a sum of consecutive naturals, for example, 121233 + ... + 122294.

It is an arithmetic number, because the mean of its divisors is an integer number (15829320).

Almost surely, 2^129312837 is an apocalyptic number.

It is an amenable number.

129312837 is a deficient number, since it is larger than the sum of its proper divisors (60639003).

129312837 is a wasteful number, since it uses less digits than its factorization.

129312837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243592 (or 243589 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 129312837 is about 11371.5802331954. The cubic root of 129312837 is about 505.6855532505.

The spelling of 129312837 in words is "one hundred twenty-nine million, three hundred twelve thousand, eight hundred thirty-seven".