26516689 has 2 divisors, whose sum is σ = 26516690. Its totient is φ = 26516688.

The previous prime is 26516683. The next prime is 26516713. The reversal of 26516689 is 98661562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 9641025 = 4108^2 + 3105^2 .

It is a cyclic number.

It is not a de Polignac number, because 26516689 - 2⁷ = 26516561 is a prime.

It is not a weakly prime, because it can be changed into another prime (26516683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13258344 + 13258345.

It is an arithmetic number, because the mean of its divisors is an integer number (13258345).

Almost surely, 2^26516689 is an apocalyptic number.

It is an amenable number.

26516689 is a deficient number, since it is larger than the sum of its proper divisors (1).

26516689 is an equidigital number, since it uses as much as digits as its factorization.

26516689 is an evil number, because the sum of its binary digits is even.

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

The square root of 26516689 is about 5149.4357943371. The cubic root of 26516689 is about 298.1991709381.

The spelling of 26516689 in words is "twenty-six million, five hundred sixteen thousand, six hundred eighty-nine".