208789213 has 2 divisors, whose sum is σ = 208789214. Its totient is φ = 208789212.

The previous prime is 208789201. The next prime is 208789249. The reversal of 208789213 is 312987802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127735204 + 81054009 = 11302^2 + 9003^2 .

It is a cyclic number.

It is not a de Polignac number, because 208789213 - 2¹³ = 208781021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208789013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104394606 + 104394607.

It is an arithmetic number, because the mean of its divisors is an integer number (104394607).

Almost surely, 2^208789213 is an apocalyptic number.

It is an amenable number.

208789213 is a deficient number, since it is larger than the sum of its proper divisors (1).

208789213 is an equidigital number, since it uses as much as digits as its factorization.

208789213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 208789213 is about 14449.5402349002. The cubic root of 208789213 is about 593.2476398215.

The spelling of 208789213 in words is "two hundred eight million, seven hundred eighty-nine thousand, two hundred thirteen".