26722081 has 2 divisors, whose sum is σ = 26722082. Its totient is φ = 26722080.

The previous prime is 26722063. The next prime is 26722097. The reversal of 26722081 is 18022762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18792225 + 7929856 = 4335^2 + 2816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26722081 is a prime.

It is a super-2 number, since 2×26722081² = 1428139225941122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26722781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13361040 + 13361041.

It is an arithmetic number, because the mean of its divisors is an integer number (13361041).

Almost surely, 2^26722081 is an apocalyptic number.

It is an amenable number.

26722081 is a deficient number, since it is larger than the sum of its proper divisors (1).

26722081 is an equidigital number, since it uses as much as digits as its factorization.

26722081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 26722081 is about 5169.3404801773. The cubic root of 26722081 is about 298.9671183029.

It can be divided in two parts, 2672 and 2081, that added together give a triangular number (4753 = T₉₇).

The spelling of 26722081 in words is "twenty-six million, seven hundred twenty-two thousand, eighty-one".