26378459 has 2 divisors, whose sum is σ = 26378460. Its totient is φ = 26378458.

The previous prime is 26378449. The next prime is 26378461. The reversal of 26378459 is 95487362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26378459 is a prime.

Together with 26378461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26378449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13189229 + 13189230.

It is an arithmetic number, because the mean of its divisors is an integer number (13189230).

Almost surely, 2^26378459 is an apocalyptic number.

26378459 is a deficient number, since it is larger than the sum of its proper divisors (1).

26378459 is an equidigital number, since it uses as much as digits as its factorization.

26378459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 26378459 is about 5135.9963979738. The cubic root of 26378459 is about 297.6801027955.

The spelling of 26378459 in words is "twenty-six million, three hundred seventy-eight thousand, four hundred fifty-nine".