129873331 has 8 divisors (see below), whose sum is σ = 150860384. Its totient is φ = 109494720.

The previous prime is 129873329. The next prime is 129873343. The reversal of 129873331 is 133378921.

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

It is a cyclic number.

It is not a de Polignac number, because 129873331 - 2¹ = 129873329 is a prime.

It is a super-2 number, since 2×129873331² = 33734164210071122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129873301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151650 + ... + 152503.

It is an arithmetic number, because the mean of its divisors is an integer number (18857548).

Almost surely, 2^129873331 is an apocalyptic number.

129873331 is a deficient number, since it is larger than the sum of its proper divisors (20987053).

129873331 is an equidigital number, since it uses as much as digits as its factorization.

129873331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304221.

The product of its digits is 27216, while the sum is 37.

The square root of 129873331 is about 11396.1980941014. The cubic root of 129873331 is about 506.4151152516.

The spelling of 129873331 in words is "one hundred twenty-nine million, eight hundred seventy-three thousand, three hundred thirty-one".