26726389 has 2 divisors, whose sum is σ = 26726390. Its totient is φ = 26726388.

The previous prime is 26726387. The next prime is 26726393. The reversal of 26726389 is 98362762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26440164 + 286225 = 5142^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 26726389 - 2¹ = 26726387 is a prime.

Together with 26726387, 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 (26726387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13363194 + 13363195.

It is an arithmetic number, because the mean of its divisors is an integer number (13363195).

Almost surely, 2^26726389 is an apocalyptic number.

It is an amenable number.

26726389 is a deficient number, since it is larger than the sum of its proper divisors (1).

26726389 is an equidigital number, since it uses as much as digits as its factorization.

26726389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 26726389 is about 5169.7571509695. The cubic root of 26726389 is about 298.9831834332.

The spelling of 26726389 in words is "twenty-six million, seven hundred twenty-six thousand, three hundred eighty-nine".