26968561 has 4 divisors (see below), whose sum is σ = 26980324. Its totient is φ = 26956800.

The previous prime is 26968549. The next prime is 26968567. The reversal of 26968561 is 16586962.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 250000 + 26718561 = 500^2 + 5169^2 .

It is a cyclic number.

It is not a de Polignac number, because 26968561 - 2⁷ = 26968433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26968567) 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 in 3 ways as a sum of consecutive naturals, for example, 1200 + ... + 7441.

It is an arithmetic number, because the mean of its divisors is an integer number (6745081).

Almost surely, 2^26968561 is an apocalyptic number.

It is an amenable number.

26968561 is a deficient number, since it is larger than the sum of its proper divisors (11763).

26968561 is an equidigital number, since it uses as much as digits as its factorization.

26968561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11762.

The product of its digits is 155520, while the sum is 43.

The square root of 26968561 is about 5193.1263223611. The cubic root of 26968561 is about 299.8835140352.

The spelling of 26968561 in words is "twenty-six million, nine hundred sixty-eight thousand, five hundred sixty-one".