26780693 has 2 divisors, whose sum is σ = 26780694. Its totient is φ = 26780692.

The previous prime is 26780687. The next prime is 26780759. The reversal of 26780693 is 39608762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23746129 + 3034564 = 4873^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 26780693 - 2⁶ = 26780629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26780693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26780893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13390346 + 13390347.

It is an arithmetic number, because the mean of its divisors is an integer number (13390347).

Almost surely, 2^26780693 is an apocalyptic number.

It is an amenable number.

26780693 is a deficient number, since it is larger than the sum of its proper divisors (1).

26780693 is an equidigital number, since it uses as much as digits as its factorization.

26780693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 26780693 is about 5175.0065700441. The cubic root of 26780693 is about 299.1855427173.

The spelling of 26780693 in words is "twenty-six million, seven hundred eighty thousand, six hundred ninety-three".