26720647 has 2 divisors, whose sum is σ = 26720648. Its totient is φ = 26720646.

The previous prime is 26720627. The next prime is 26720653. The reversal of 26720647 is 74602762.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26720647 - 2¹⁵ = 26687879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26720627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360323 + 13360324.

It is an arithmetic number, because the mean of its divisors is an integer number (13360324).

Almost surely, 2^26720647 is an apocalyptic number.

26720647 is a deficient number, since it is larger than the sum of its proper divisors (1).

26720647 is an equidigital number, since it uses as much as digits as its factorization.

26720647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 26720647 is about 5169.2017759031. The cubic root of 26720647 is about 298.9617703347.

The spelling of 26720647 in words is "twenty-six million, seven hundred twenty thousand, six hundred forty-seven".