207720089 has 2 divisors, whose sum is σ = 207720090. Its totient is φ = 207720088.

The previous prime is 207720083. The next prime is 207720131. The reversal of 207720089 is 980027702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135606025 + 72114064 = 11645^2 + 8492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207720089 is a prime.

It is a Chen prime.

It is equal to p_11482595 and since 207720089 and 11482595 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (207720083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103860044 + 103860045.

It is an arithmetic number, because the mean of its divisors is an integer number (103860045).

Almost surely, 2^207720089 is an apocalyptic number.

It is an amenable number.

207720089 is a deficient number, since it is larger than the sum of its proper divisors (1).

207720089 is an equidigital number, since it uses as much as digits as its factorization.

207720089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 207720089 is about 14412.4976669556. The cubic root of 207720089 is about 592.2333138450.

The spelling of 207720089 in words is "two hundred seven million, seven hundred twenty thousand, eighty-nine".