26513869 has 4 divisors (see below), whose sum is σ = 26563420. Its totient is φ = 26464320.

The previous prime is 26513857. The next prime is 26513881. The reversal of 26513869 is 96831562.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (26513857) and next prime (26513881).

It can be written as a sum of positive squares in 2 ways, for example, as 3348900 + 23164969 = 1830^2 + 4813^2 .

It is a cyclic number.

It is not a de Polignac number, because 26513869 - 2¹⁵ = 26481101 is a prime.

It is a super-2 number, since 2×26513869² = 1405970498698322, 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 (26514869) 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, 23964 + ... + 25045.

It is an arithmetic number, because the mean of its divisors is an integer number (6640855).

Almost surely, 2^26513869 is an apocalyptic number.

It is an amenable number.

26513869 is a deficient number, since it is larger than the sum of its proper divisors (49551).

26513869 is an equidigital number, since it uses as much as digits as its factorization.

26513869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49550.

The product of its digits is 77760, while the sum is 40.

The square root of 26513869 is about 5149.1619706511. The cubic root of 26513869 is about 298.1885995897.

The spelling of 26513869 in words is "twenty-six million, five hundred thirteen thousand, eight hundred sixty-nine".