8726989 has 2 divisors, whose sum is σ = 8726990. Its totient is φ = 8726988.

The previous prime is 8726987. The next prime is 8727031. The reversal of 8726989 is 9896278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5978025 + 2748964 = 2445^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 8726989 - 2¹ = 8726987 is a prime.

It is a super-2 number, since 2×8726989² = 152320674012242, which contains 22 as substring.

Together with 8726987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8726983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4363494 + 4363495.

It is an arithmetic number, because the mean of its divisors is an integer number (4363495).

Almost surely, 2^8726989 is an apocalyptic number.

It is an amenable number.

8726989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8726989 is an equidigital number, since it uses as much as digits as its factorization.

8726989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 8726989 is about 2954.1477620458. The cubic root of 8726989 is about 205.8834685126.

The spelling of 8726989 in words is "eight million, seven hundred twenty-six thousand, nine hundred eighty-nine".