129990326 has 16 divisors (see below), whose sum is σ = 197402400. Its totient is φ = 64193088.

The previous prime is 129990317. The next prime is 129990331. The reversal of 129990326 is 623099921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116660 + ... + 117768.

It is an arithmetic number, because the mean of its divisors is an integer number (12337650).

Almost surely, 2^129990326 is an apocalyptic number.

129990326 is a deficient number, since it is larger than the sum of its proper divisors (67412074).

129990326 is a wasteful number, since it uses less digits than its factorization.

129990326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 129990326 is about 11401.3300101348. The cubic root of 129990326 is about 506.5671358239.

The spelling of 129990326 in words is "one hundred twenty-nine million, nine hundred ninety thousand, three hundred twenty-six".