26609939 has 2 divisors, whose sum is σ = 26609940. Its totient is φ = 26609938.

The previous prime is 26609927. The next prime is 26609941. The reversal of 26609939 is 93990662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26609939 - 2²⁴ = 9832723 is a prime.

It is a Sophie Germain prime.

Together with 26609941, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26609939.

It is not a weakly prime, because it can be changed into another prime (26609039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13304969 + 13304970.

It is an arithmetic number, because the mean of its divisors is an integer number (13304970).

Almost surely, 2^26609939 is an apocalyptic number.

26609939 is a deficient number, since it is larger than the sum of its proper divisors (1).

26609939 is an equidigital number, since it uses as much as digits as its factorization.

26609939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 26609939 is about 5158.4822380231. The cubic root of 26609939 is about 298.5483163421.

The spelling of 26609939 in words is "twenty-six million, six hundred nine thousand, nine hundred thirty-nine".