26448509 has 2 divisors, whose sum is σ = 26448510. Its totient is φ = 26448508.

The previous prime is 26448491. The next prime is 26448517. The reversal of 26448509 is 90584462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16176484 + 10272025 = 4022^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 26448509 - 2¹² = 26444413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26448559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13224254 + 13224255.

It is an arithmetic number, because the mean of its divisors is an integer number (13224255).

Almost surely, 2^26448509 is an apocalyptic number.

It is an amenable number.

26448509 is a deficient number, since it is larger than the sum of its proper divisors (1).

26448509 is an equidigital number, since it uses as much as digits as its factorization.

26448509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 26448509 is about 5142.8113906695. The cubic root of 26448509 is about 297.9433739229.

The spelling of 26448509 in words is "twenty-six million, four hundred forty-eight thousand, five hundred nine".