26010989 has 2 divisors, whose sum is σ = 26010990. Its totient is φ = 26010988.

The previous prime is 26010961. The next prime is 26010991. The reversal of 26010989 is 98901062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18774889 + 7236100 = 4333^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 26010989 - 2²⁴ = 9233773 is a prime.

It is a Sophie Germain prime.

Together with 26010991, it forms a pair of twin primes.

It is a Chen prime.

26010989 is a modest number, since divided by 10989 gives 26 as remainder.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26010389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13005494 + 13005495.

It is an arithmetic number, because the mean of its divisors is an integer number (13005495).

Almost surely, 2^26010989 is an apocalyptic number.

It is an amenable number.

26010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26010989 is an equidigital number, since it uses as much as digits as its factorization.

26010989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 26010989 is about 5100.0969598626. The cubic root of 26010989 is about 296.2913379739.

The spelling of 26010989 in words is "twenty-six million, ten thousand, nine hundred eighty-nine".