26738989 has 2 divisors, whose sum is σ = 26738990. Its totient is φ = 26738988.

The previous prime is 26738983. The next prime is 26739029. The reversal of 26738989 is 98983762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25583364 + 1155625 = 5058^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 26738989 - 2⁹ = 26738477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26738983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13369494 + 13369495.

It is an arithmetic number, because the mean of its divisors is an integer number (13369495).

Almost surely, 2^26738989 is an apocalyptic number.

It is an amenable number.

26738989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26738989 is an equidigital number, since it uses as much as digits as its factorization.

26738989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 26738989 is about 5170.9756332824. The cubic root of 26738989 is about 299.0301606768.

The spelling of 26738989 in words is "twenty-six million, seven hundred thirty-eight thousand, nine hundred eighty-nine".