26642653 has 2 divisors, whose sum is σ = 26642654. Its totient is φ = 26642652.

The previous prime is 26642641. The next prime is 26642663. The reversal of 26642653 is 35624662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 3583449 = 4802^2 + 1893^2 .

It is a cyclic number.

It is not a de Polignac number, because 26642653 - 2⁹ = 26642141 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26642663) 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, 13321326 + 13321327.

It is an arithmetic number, because the mean of its divisors is an integer number (13321327).

Almost surely, 2^26642653 is an apocalyptic number.

It is an amenable number.

26642653 is a deficient number, since it is larger than the sum of its proper divisors (1).

26642653 is an equidigital number, since it uses as much as digits as its factorization.

26642653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 34.

The square root of 26642653 is about 5161.6521579820. The cubic root of 26642653 is about 298.6706103715.

Subtracting 26642653 from its reverse (35624662), we obtain a square (8982009 = 2997²).

The spelling of 26642653 in words is "twenty-six million, six hundred forty-two thousand, six hundred fifty-three".