207089989 has 2 divisors, whose sum is σ = 207089990. Its totient is φ = 207089988.

The previous prime is 207089983. The next prime is 207090011. The reversal of 207089989 is 989980702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115562500 + 91527489 = 10750^2 + 9567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207089989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207089983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103544994 + 103544995.

It is an arithmetic number, because the mean of its divisors is an integer number (103544995).

Almost surely, 2^207089989 is an apocalyptic number.

It is an amenable number.

207089989 is a deficient number, since it is larger than the sum of its proper divisors (1).

207089989 is an equidigital number, since it uses as much as digits as its factorization.

207089989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 207089989 is about 14390.6215640604. The cubic root of 207089989 is about 591.6338786918.

The spelling of 207089989 in words is "two hundred seven million, eighty-nine thousand, nine hundred eighty-nine".