26404493 has 2 divisors, whose sum is σ = 26404494. Its totient is φ = 26404492.

The previous prime is 26404489. The next prime is 26404559. The reversal of 26404493 is 39440462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15665764 + 10738729 = 3958^2 + 3277^2 .

It is a cyclic number.

It is not a de Polignac number, because 26404493 - 2² = 26404489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26404423) 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, 13202246 + 13202247.

It is an arithmetic number, because the mean of its divisors is an integer number (13202247).

Almost surely, 2^26404493 is an apocalyptic number.

It is an amenable number.

26404493 is a deficient number, since it is larger than the sum of its proper divisors (1).

26404493 is an equidigital number, since it uses as much as digits as its factorization.

26404493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 26404493 is about 5138.5302373344. The cubic root of 26404493 is about 297.7780015602.

The spelling of 26404493 in words is "twenty-six million, four hundred four thousand, four hundred ninety-three".