26487493 has 4 divisors (see below), whose sum is σ = 26578188. Its totient is φ = 26396800.

The previous prime is 26487457. The next prime is 26487509. The reversal of 26487493 is 39478462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39478462 = 2 ⋅19739231.

It can be written as a sum of positive squares in 2 ways, for example, as 16957924 + 9529569 = 4118^2 + 3087^2 .

It is a cyclic number.

It is not a de Polignac number, because 26487493 - 2⁹ = 26486981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26487403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44908 + ... + 45493.

It is an arithmetic number, because the mean of its divisors is an integer number (6644547).

Almost surely, 2^26487493 is an apocalyptic number.

It is an amenable number.

26487493 is a deficient number, since it is larger than the sum of its proper divisors (90695).

26487493 is an equidigital number, since it uses as much as digits as its factorization.

26487493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90694.

The product of its digits is 290304, while the sum is 43.

The square root of 26487493 is about 5146.6001398982. The cubic root of 26487493 is about 298.0896874318.

The spelling of 26487493 in words is "twenty-six million, four hundred eighty-seven thousand, four hundred ninety-three".