208314989 has 2 divisors, whose sum is σ = 208314990. Its totient is φ = 208314988.

The previous prime is 208314971. The next prime is 208315007. The reversal of 208314989 is 989413802.

It is a happy number.

208314989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (208314971) and next prime (208315007).

It can be written as a sum of positive squares in only one way, i.e., 124500964 + 83814025 = 11158^2 + 9155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208314989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208314929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104157494 + 104157495.

It is an arithmetic number, because the mean of its divisors is an integer number (104157495).

Almost surely, 2^208314989 is an apocalyptic number.

It is an amenable number.

208314989 is a deficient number, since it is larger than the sum of its proper divisors (1).

208314989 is an equidigital number, since it uses as much as digits as its factorization.

208314989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 208314989 is about 14433.1212494041. The cubic root of 208314989 is about 592.7981505479.

The spelling of 208314989 in words is "two hundred eight million, three hundred fourteen thousand, nine hundred eighty-nine".