208852381 has 2 divisors, whose sum is σ = 208852382. Its totient is φ = 208852380.

The previous prime is 208852339. The next prime is 208852411. The reversal of 208852381 is 183258802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 16475481 = 13870^2 + 4059^2 .

It is a cyclic number.

It is not a de Polignac number, because 208852381 - 2¹¹ = 208850333 is a prime.

It is a super-2 number, since 2×208852381² = 87238634098738322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208852381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208852321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104426190 + 104426191.

It is an arithmetic number, because the mean of its divisors is an integer number (104426191).

Almost surely, 2^208852381 is an apocalyptic number.

It is an amenable number.

208852381 is a deficient number, since it is larger than the sum of its proper divisors (1).

208852381 is an equidigital number, since it uses as much as digits as its factorization.

208852381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 208852381 is about 14451.7258830909. The cubic root of 208852381 is about 593.3074616993.

The spelling of 208852381 in words is "two hundred eight million, eight hundred fifty-two thousand, three hundred eighty-one".