26749813 has 2 divisors, whose sum is σ = 26749814. Its totient is φ = 26749812.

The previous prime is 26749783. The next prime is 26749829. The reversal of 26749813 is 31894762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20232004 + 6517809 = 4498^2 + 2553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26749813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26744813) 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, 13374906 + 13374907.

It is an arithmetic number, because the mean of its divisors is an integer number (13374907).

Almost surely, 2^26749813 is an apocalyptic number.

It is an amenable number.

26749813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26749813 is an equidigital number, since it uses as much as digits as its factorization.

26749813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 26749813 is about 5172.0221383904. The cubic root of 26749813 is about 299.0705045833.

The spelling of 26749813 in words is "twenty-six million, seven hundred forty-nine thousand, eight hundred thirteen".