26123609 has 2 divisors, whose sum is σ = 26123610. Its totient is φ = 26123608.

The previous prime is 26123599. The next prime is 26123623. The reversal of 26123609 is 90632162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13542400 + 12581209 = 3680^2 + 3547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26123609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26123639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13061804 + 13061805.

It is an arithmetic number, because the mean of its divisors is an integer number (13061805).

Almost surely, 2^26123609 is an apocalyptic number.

It is an amenable number.

26123609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26123609 is an equidigital number, since it uses as much as digits as its factorization.

26123609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 26123609 is about 5111.1260011860. The cubic root of 26123609 is about 296.7183406741.

The spelling of 26123609 in words is "twenty-six million, one hundred twenty-three thousand, six hundred nine".