10266989 has 2 divisors, whose sum is σ = 10266990. Its totient is φ = 10266988.

The previous prime is 10266979. The next prime is 10267051. The reversal of 10266989 is 98966201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10048900 + 218089 = 3170^2 + 467^2 .

It is an emirp because it is prime and its reverse (98966201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10266989 - 2¹² = 10262893 is a prime.

It is a super-4 number, since 4×10266989⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10266959) 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, 5133494 + 5133495.

It is an arithmetic number, because the mean of its divisors is an integer number (5133495).

Almost surely, 2^10266989 is an apocalyptic number.

It is an amenable number.

10266989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10266989 is an equidigital number, since it uses as much as digits as its factorization.

10266989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 10266989 is about 3204.2142562569. The cubic root of 10266989 is about 217.3440216953.

The spelling of 10266989 in words is "ten million, two hundred sixty-six thousand, nine hundred eighty-nine".