26581369 has 2 divisors, whose sum is σ = 26581370. Its totient is φ = 26581368.

The previous prime is 26581351. The next prime is 26581391. The reversal of 26581369 is 96318562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 1210000 = 5037^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 26581369 - 2⁵ = 26581337 is a prime.

It is a super-2 number, since 2×26581369² = 1413138355828322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26581309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13290684 + 13290685.

It is an arithmetic number, because the mean of its divisors is an integer number (13290685).

Almost surely, 2^26581369 is an apocalyptic number.

It is an amenable number.

26581369 is a deficient number, since it is larger than the sum of its proper divisors (1).

26581369 is an equidigital number, since it uses as much as digits as its factorization.

26581369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 26581369 is about 5155.7122689305. The cubic root of 26581369 is about 298.4414317200.

The spelling of 26581369 in words is "twenty-six million, five hundred eighty-one thousand, three hundred sixty-nine".