208020929 has 2 divisors, whose sum is σ = 208020930. Its totient is φ = 208020928.

The previous prime is 208020893. The next prime is 208020931. The reversal of 208020929 is 929020802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182790400 + 25230529 = 13520^2 + 5023^2 .

It is a cyclic number.

It is not a de Polignac number, because 208020929 - 2¹² = 208016833 is a prime.

Together with 208020931, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 208020895 and 208020904.

It is not a weakly prime, because it can be changed into another prime (208020979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104010464 + 104010465.

It is an arithmetic number, because the mean of its divisors is an integer number (104010465).

Almost surely, 2^208020929 is an apocalyptic number.

It is an amenable number.

208020929 is a deficient number, since it is larger than the sum of its proper divisors (1).

208020929 is an equidigital number, since it uses as much as digits as its factorization.

208020929 is an evil number, because the sum of its binary digits is even.

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

The square root of 208020929 is about 14422.9306661302. The cubic root of 208020929 is about 592.5190854766.

The spelling of 208020929 in words is "two hundred eight million, twenty thousand, nine hundred twenty-nine".