8207989 has 2 divisors, whose sum is σ = 8207990. Its totient is φ = 8207988.

The previous prime is 8207971. The next prime is 8207999. The reversal of 8207989 is 9897028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6200100 + 2007889 = 2490^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 8207989 - 2⁷ = 8207861 is a prime.

It is a super-3 number, since 3×8207989³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8207909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4103994 + 4103995.

It is an arithmetic number, because the mean of its divisors is an integer number (4103995).

Almost surely, 2^8207989 is an apocalyptic number.

It is an amenable number.

8207989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8207989 is an equidigital number, since it uses as much as digits as its factorization.

8207989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 8207989 is about 2864.9588129675. The cubic root of 8207989 is about 201.7184342965.

The spelling of 8207989 in words is "eight million, two hundred seven thousand, nine hundred eighty-nine".