26378249 has 2 divisors, whose sum is σ = 26378250. Its totient is φ = 26378248.

The previous prime is 26378201. The next prime is 26378257. The reversal of 26378249 is 94287362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13454224 + 12924025 = 3668^2 + 3595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26378249 is a prime.

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 (26378269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13189124 + 13189125.

It is an arithmetic number, because the mean of its divisors is an integer number (13189125).

Almost surely, 2^26378249 is an apocalyptic number.

It is an amenable number.

26378249 is a deficient number, since it is larger than the sum of its proper divisors (1).

26378249 is an equidigital number, since it uses as much as digits as its factorization.

26378249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 26378249 is about 5135.9759539936. The cubic root of 26378249 is about 297.6793128455.

The spelling of 26378249 in words is "twenty-six million, three hundred seventy-eight thousand, two hundred forty-nine".