8727989 has 2 divisors, whose sum is σ = 8727990. Its totient is φ = 8727988.

The previous prime is 8727937. The next prime is 8728037. The reversal of 8727989 is 9897278.

It is a happy number.

8727989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4558225 + 4169764 = 2135^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 8727989 - 2¹² = 8723893 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8727689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4363994 + 4363995.

It is an arithmetic number, because the mean of its divisors is an integer number (4363995).

Almost surely, 2^8727989 is an apocalyptic number.

It is an amenable number.

8727989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8727989 is an equidigital number, since it uses as much as digits as its factorization.

8727989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 50.

The square root of 8727989 is about 2954.3170107488. The cubic root of 8727989 is about 205.8913320726.

The spelling of 8727989 in words is "eight million, seven hundred twenty-seven thousand, nine hundred eighty-nine".