208734089 has 2 divisors, whose sum is σ = 208734090. Its totient is φ = 208734088.

The previous prime is 208734023. The next prime is 208734121. The reversal of 208734089 is 980437802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164044864 + 44689225 = 12808^2 + 6685^2 .

It is a cyclic number.

It is not a de Polignac number, because 208734089 - 2¹² = 208729993 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (208734289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104367044 + 104367045.

It is an arithmetic number, because the mean of its divisors is an integer number (104367045).

Almost surely, 2^208734089 is an apocalyptic number.

It is an amenable number.

208734089 is a deficient number, since it is larger than the sum of its proper divisors (1).

208734089 is an equidigital number, since it uses as much as digits as its factorization.

208734089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 208734089 is about 14447.6326434472. The cubic root of 208734089 is about 593.1954259789.

The spelling of 208734089 in words is "two hundred eight million, seven hundred thirty-four thousand, eighty-nine".