26491169 has 2 divisors, whose sum is σ = 26491170. Its totient is φ = 26491168.

The previous prime is 26491163. The next prime is 26491229. The reversal of 26491169 is 96119462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26388769 + 102400 = 5137^2 + 320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26491169 is a prime.

It is a super-2 number, since 2×26491169² = 1403564069973122, 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 (26491163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13245584 + 13245585.

It is an arithmetic number, because the mean of its divisors is an integer number (13245585).

Almost surely, 2^26491169 is an apocalyptic number.

It is an amenable number.

26491169 is a deficient number, since it is larger than the sum of its proper divisors (1).

26491169 is an equidigital number, since it uses as much as digits as its factorization.

26491169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 26491169 is about 5146.9572564769. The cubic root of 26491169 is about 298.1034766694.

The spelling of 26491169 in words is "twenty-six million, four hundred ninety-one thousand, one hundred sixty-nine".