26891369 has 2 divisors, whose sum is σ = 26891370. Its totient is φ = 26891368.

The previous prime is 26891339. The next prime is 26891377. The reversal of 26891369 is 96319862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19465744 + 7425625 = 4412^2 + 2725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26891369 is a prime.

It is a super-2 number, since 2×26891369² = 1446291453388322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26891309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445684 + 13445685.

It is an arithmetic number, because the mean of its divisors is an integer number (13445685).

Almost surely, 2^26891369 is an apocalyptic number.

It is an amenable number.

26891369 is a deficient number, since it is larger than the sum of its proper divisors (1).

26891369 is an equidigital number, since it uses as much as digits as its factorization.

26891369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 26891369 is about 5185.6888645579. The cubic root of 26891369 is about 299.5971221700.

The spelling of 26891369 in words is "twenty-six million, eight hundred ninety-one thousand, three hundred sixty-nine".