26721073 has 2 divisors, whose sum is σ = 26721074. Its totient is φ = 26721072.

The previous prime is 26721047. The next prime is 26721109. The reversal of 26721073 is 37012762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25482304 + 1238769 = 5048^2 + 1113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26721073 is a prime.

It is not a weakly prime, because it can be changed into another prime (26724073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360536 + 13360537.

It is an arithmetic number, because the mean of its divisors is an integer number (13360537).

Almost surely, 2^26721073 is an apocalyptic number.

It is an amenable number.

26721073 is a deficient number, since it is larger than the sum of its proper divisors (1).

26721073 is an equidigital number, since it uses as much as digits as its factorization.

26721073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 26721073 is about 5169.2429813271. The cubic root of 26721073 is about 298.9633590816.

The spelling of 26721073 in words is "twenty-six million, seven hundred twenty-one thousand, seventy-three".