26557913 has 2 divisors, whose sum is σ = 26557914. Its totient is φ = 26557912.

The previous prime is 26557907. The next prime is 26557931. The reversal of 26557913 is 31975562.

It is a happy number.

Together with next prime (26557931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24631369 + 1926544 = 4963^2 + 1388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26557913 is a prime.

It is not a weakly prime, because it can be changed into another prime (26557903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13278956 + 13278957.

It is an arithmetic number, because the mean of its divisors is an integer number (13278957).

Almost surely, 2^26557913 is an apocalyptic number.

It is an amenable number.

26557913 is a deficient number, since it is larger than the sum of its proper divisors (1).

26557913 is an equidigital number, since it uses as much as digits as its factorization.

26557913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 26557913 is about 5153.4370084440. The cubic root of 26557913 is about 298.3536220679.

The spelling of 26557913 in words is "twenty-six million, five hundred fifty-seven thousand, nine hundred thirteen".