26290493 has 4 divisors (see below), whose sum is σ = 26395488. Its totient is φ = 26185500.

The previous prime is 26290469. The next prime is 26290507. The reversal of 26290493 is 39409262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39409262 = 2 ⋅19704631.

It is a cyclic number.

It is not a de Polignac number, because 26290493 - 2¹⁴ = 26274109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26290193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52121 + ... + 52622.

It is an arithmetic number, because the mean of its divisors is an integer number (6598872).

Almost surely, 2^26290493 is an apocalyptic number.

It is an amenable number.

26290493 is a deficient number, since it is larger than the sum of its proper divisors (104995).

26290493 is a wasteful number, since it uses less digits than its factorization.

26290493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104994.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 26290493 is about 5127.4255723511. The cubic root of 26290493 is about 297.3488364172.

The spelling of 26290493 in words is "twenty-six million, two hundred ninety thousand, four hundred ninety-three".