26398369 has 2 divisors, whose sum is σ = 26398370. Its totient is φ = 26398368.

The previous prime is 26398367. The next prime is 26398373. The reversal of 26398369 is 96389362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15108769 + 11289600 = 3887^2 + 3360^2 .

It is a cyclic number.

It is not a de Polignac number, because 26398369 - 2¹ = 26398367 is a prime.

It is a super-2 number, since 2×26398369² = 1393747771720322, which contains 22 as substring.

Together with 26398367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26398363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13199184 + 13199185.

It is an arithmetic number, because the mean of its divisors is an integer number (13199185).

Almost surely, 2^26398369 is an apocalyptic number.

It is an amenable number.

26398369 is a deficient number, since it is larger than the sum of its proper divisors (1).

26398369 is an equidigital number, since it uses as much as digits as its factorization.

26398369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 26398369 is about 5137.9343125423. The cubic root of 26398369 is about 297.7549785406.

The spelling of 26398369 in words is "twenty-six million, three hundred ninety-eight thousand, three hundred sixty-nine".