208631129 has 8 divisors (see below), whose sum is σ = 238566528. Its totient is φ = 178728480.

The previous prime is 208631117. The next prime is 208631149. The reversal of 208631129 is 921136802.

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

It is a de Polignac number, because none of the positive numbers 2^k-208631129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 208631095 and 208631104.

It is not an unprimeable number, because it can be changed into a prime (208631149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 21749.

It is an arithmetic number, because the mean of its divisors is an integer number (29820816).

Almost surely, 2^208631129 is an apocalyptic number.

It is an amenable number.

208631129 is a deficient number, since it is larger than the sum of its proper divisors (29935399).

208631129 is a wasteful number, since it uses less digits than its factorization.

208631129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16375.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 208631129 is about 14444.0689904196. The cubic root of 208631129 is about 593.0978769137.

The spelling of 208631129 in words is "two hundred eight million, six hundred thirty-one thousand, one hundred twenty-nine".