26805629 has 2 divisors, whose sum is σ = 26805630. Its totient is φ = 26805628.

The previous prime is 26805619. The next prime is 26805631. The reversal of 26805629 is 92650862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26728900 + 76729 = 5170^2 + 277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26805629 is a prime.

Together with 26805631, 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 = 26805592 and 26805601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26805619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13402814 + 13402815.

It is an arithmetic number, because the mean of its divisors is an integer number (13402815).

Almost surely, 2^26805629 is an apocalyptic number.

It is an amenable number.

26805629 is a deficient number, since it is larger than the sum of its proper divisors (1).

26805629 is an equidigital number, since it uses as much as digits as its factorization.

26805629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 26805629 is about 5177.4152817791. The cubic root of 26805629 is about 299.2783729807.

The spelling of 26805629 in words is "twenty-six million, eight hundred five thousand, six hundred twenty-nine".