26528639 has 2 divisors, whose sum is σ = 26528640. Its totient is φ = 26528638.

The previous prime is 26528603. The next prime is 26528641. The reversal of 26528639 is 93682562.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26528639 is a prime.

Together with 26528641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 26528596 and 26528605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26528659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13264319 + 13264320.

It is an arithmetic number, because the mean of its divisors is an integer number (13264320).

Almost surely, 2^26528639 is an apocalyptic number.

26528639 is a deficient number, since it is larger than the sum of its proper divisors (1).

26528639 is an equidigital number, since it uses as much as digits as its factorization.

26528639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 26528639 is about 5150.5959849322. The cubic root of 26528639 is about 298.2439596486.

The spelling of 26528639 in words is "twenty-six million, five hundred twenty-eight thousand, six hundred thirty-nine".