26289013 has 4 divisors (see below), whose sum is σ = 26368768. Its totient is φ = 26209260.

The previous prime is 26289001. The next prime is 26289017. The reversal of 26289013 is 31098262.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26289013 is a prime.

It is a super-2 number, since 2×26289013² = 1382224409028338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26289017) 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, 39381 + ... + 40042.

It is an arithmetic number, because the mean of its divisors is an integer number (6592192).

Almost surely, 2^26289013 is an apocalyptic number.

It is an amenable number.

26289013 is a deficient number, since it is larger than the sum of its proper divisors (79755).

26289013 is an equidigital number, since it uses as much as digits as its factorization.

26289013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79754.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 26289013 is about 5127.2812483811. The cubic root of 26289013 is about 297.3432566494.

Subtracting 26289013 from its reverse (31098262), we obtain a square (4809249 = 2193²).

The spelling of 26289013 in words is "twenty-six million, two hundred eighty-nine thousand, thirteen".