26728901 has 2 divisors, whose sum is σ = 26728902. Its totient is φ = 26728900.

The previous prime is 26728883. The next prime is 26728909. The reversal of 26728901 is 10982762.

It is a happy number.

It is a Cunningham number, because it is equal to 5170²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26728900 + 1 = 5170^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26728901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26728909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13364450 + 13364451.

It is an arithmetic number, because the mean of its divisors is an integer number (13364451).

Almost surely, 2^26728901 is an apocalyptic number.

It is an amenable number.

26728901 is a deficient number, since it is larger than the sum of its proper divisors (1).

26728901 is an equidigital number, since it uses as much as digits as its factorization.

26728901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 26728901 is about 5170.0000967118. Note that the first 4 decimals coincide. The cubic root of 26728901 is about 298.9925502333.

The spelling of 26728901 in words is "twenty-six million, seven hundred twenty-eight thousand, nine hundred one".