26404397 has 2 divisors, whose sum is σ = 26404398. Its totient is φ = 26404396.

The previous prime is 26404393. The next prime is 26404423. The reversal of 26404397 is 79340462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23483716 + 2920681 = 4846^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 26404397 - 2² = 26404393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26404393) 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, 13202198 + 13202199.

It is an arithmetic number, because the mean of its divisors is an integer number (13202199).

Almost surely, 2^26404397 is an apocalyptic number.

It is an amenable number.

26404397 is a deficient number, since it is larger than the sum of its proper divisors (1).

26404397 is an equidigital number, since it uses as much as digits as its factorization.

26404397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 26404397 is about 5138.5208961334. The cubic root of 26404397 is about 297.7776406782. Note that the first 3 decimals are identical.

The spelling of 26404397 in words is "twenty-six million, four hundred four thousand, three hundred ninety-seven".