26581189 has 2 divisors, whose sum is σ = 26581190. Its totient is φ = 26581188.

The previous prime is 26581187. The next prime is 26581213. The reversal of 26581189 is 98118562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25100100 + 1481089 = 5010^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 26581189 - 2¹ = 26581187 is a prime.

Together with 26581187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26581187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13290594 + 13290595.

It is an arithmetic number, because the mean of its divisors is an integer number (13290595).

Almost surely, 2^26581189 is an apocalyptic number.

It is an amenable number.

26581189 is a deficient number, since it is larger than the sum of its proper divisors (1).

26581189 is an equidigital number, since it uses as much as digits as its factorization.

26581189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 26581189 is about 5155.6948125350. The cubic root of 26581189 is about 298.4407580705.

The spelling of 26581189 in words is "twenty-six million, five hundred eighty-one thousand, one hundred eighty-nine".