26685643 has 2 divisors, whose sum is σ = 26685644. Its totient is φ = 26685642.

The previous prime is 26685623. The next prime is 26685649. The reversal of 26685643 is 34658662.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26685643 - 2¹³ = 26677451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26685596 and 26685605.

It is not a weakly prime, because it can be changed into another prime (26685649) 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, 13342821 + 13342822.

It is an arithmetic number, because the mean of its divisors is an integer number (13342822).

Almost surely, 2^26685643 is an apocalyptic number.

26685643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26685643 is an equidigital number, since it uses as much as digits as its factorization.

26685643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 26685643 is about 5165.8148437589. The cubic root of 26685643 is about 298.8311668257.

The spelling of 26685643 in words is "twenty-six million, six hundred eighty-five thousand, six hundred forty-three".