26897551 has 2 divisors, whose sum is σ = 26897552. Its totient is φ = 26897550.

The previous prime is 26897543. The next prime is 26897567. The reversal of 26897551 is 15579862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26897551 - 2³ = 26897543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26897498 and 26897507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26897851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13448775 + 13448776.

It is an arithmetic number, because the mean of its divisors is an integer number (13448776).

Almost surely, 2^26897551 is an apocalyptic number.

26897551 is a deficient number, since it is larger than the sum of its proper divisors (1).

26897551 is an equidigital number, since it uses as much as digits as its factorization.

26897551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 26897551 is about 5186.2848938330. The cubic root of 26897551 is about 299.6200783274.

The spelling of 26897551 in words is "twenty-six million, eight hundred ninety-seven thousand, five hundred fifty-one".