129673606 has 4 divisors (see below), whose sum is σ = 194510412. Its totient is φ = 64836802.

The previous prime is 129673573. The next prime is 129673667. The reversal of 129673606 is 606376921.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32418400 + ... + 32418403.

It is an arithmetic number, because the mean of its divisors is an integer number (48627603).

Almost surely, 2^129673606 is an apocalyptic number.

129673606 is a deficient number, since it is larger than the sum of its proper divisors (64836806).

129673606 is an equidigital number, since it uses as much as digits as its factorization.

129673606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64836805.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 129673606 is about 11387.4319317395. The cubic root of 129673606 is about 506.1553861493.

The spelling of 129673606 in words is "one hundred twenty-nine million, six hundred seventy-three thousand, six hundred six".