26617889 has 2 divisors, whose sum is σ = 26617890. Its totient is φ = 26617888.

The previous prime is 26617849. The next prime is 26617901. The reversal of 26617889 is 98871662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17497489 + 9120400 = 4183^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 26617889 - 2¹⁶ = 26552353 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26617849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13308944 + 13308945.

It is an arithmetic number, because the mean of its divisors is an integer number (13308945).

Almost surely, 2^26617889 is an apocalyptic number.

It is an amenable number.

26617889 is a deficient number, since it is larger than the sum of its proper divisors (1).

26617889 is an equidigital number, since it uses as much as digits as its factorization.

26617889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 26617889 is about 5159.2527559715. The cubic root of 26617889 is about 298.5780448681.

The spelling of 26617889 in words is "twenty-six million, six hundred seventeen thousand, eight hundred eighty-nine".