26621393 has 2 divisors, whose sum is σ = 26621394. Its totient is φ = 26621392.

The previous prime is 26621363. The next prime is 26621407. The reversal of 26621393 is 39312662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 1149184 = 5047^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 26621393 - 2⁸ = 26621137 is a prime.

It is not a weakly prime, because it can be changed into another prime (26621363) 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, 13310696 + 13310697.

It is an arithmetic number, because the mean of its divisors is an integer number (13310697).

Almost surely, 2^26621393 is an apocalyptic number.

It is an amenable number.

26621393 is a deficient number, since it is larger than the sum of its proper divisors (1).

26621393 is an equidigital number, since it uses as much as digits as its factorization.

26621393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 32.

The square root of 26621393 is about 5159.5923288570. The cubic root of 26621393 is about 298.5911459767.

The spelling of 26621393 in words is "twenty-six million, six hundred twenty-one thousand, three hundred ninety-three".