208140829 has 8 divisors (see below), whose sum is σ = 226671480. Its totient is φ = 189970176.

The previous prime is 208140817. The next prime is 208140833. The reversal of 208140829 is 928041802.

It can be written as a sum of positive squares in 4 ways, for example, as 31304025 + 176836804 = 5595^2 + 13298^2 .

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 208140829 - 2⁷ = 208140701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208140794 and 208140803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208140029) 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, 88792 + ... + 91105.

It is an arithmetic number, because the mean of its divisors is an integer number (28333935).

Almost surely, 2^208140829 is an apocalyptic number.

It is an amenable number.

208140829 is a deficient number, since it is larger than the sum of its proper divisors (18530651).

208140829 is a wasteful number, since it uses less digits than its factorization.

208140829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179999.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 208140829 is about 14427.0866428396. The cubic root of 208140829 is about 592.6329031803.

The spelling of 208140829 in words is "two hundred eight million, one hundred forty thousand, eight hundred twenty-nine".