26863139 has 2 divisors, whose sum is σ = 26863140. Its totient is φ = 26863138.

The previous prime is 26863079. The next prime is 26863153. The reversal of 26863139 is 93136862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26863139 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26883139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13431569 + 13431570.

It is an arithmetic number, because the mean of its divisors is an integer number (13431570).

Almost surely, 2^26863139 is an apocalyptic number.

26863139 is a deficient number, since it is larger than the sum of its proper divisors (1).

26863139 is an equidigital number, since it uses as much as digits as its factorization.

26863139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 26863139 is about 5182.9662356608. The cubic root of 26863139 is about 299.4922485204.

The spelling of 26863139 in words is "twenty-six million, eight hundred sixty-three thousand, one hundred thirty-nine".