26830513 has 4 divisors (see below), whose sum is σ = 27555700. Its totient is φ = 26105328.

The previous prime is 26830511. The next prime is 26830519. The reversal of 26830513 is 31503862.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17239104 + 9591409 = 4152^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 26830513 - 2¹ = 26830511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26830511) 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 in 3 ways as a sum of consecutive naturals, for example, 362538 + ... + 362611.

It is an arithmetic number, because the mean of its divisors is an integer number (6888925).

Almost surely, 2^26830513 is an apocalyptic number.

It is an amenable number.

26830513 is a deficient number, since it is larger than the sum of its proper divisors (725187).

26830513 is an equidigital number, since it uses as much as digits as its factorization.

26830513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725186.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 26830513 is about 5179.8178539404. The cubic root of 26830513 is about 299.3709522889.

The spelling of 26830513 in words is "twenty-six million, eight hundred thirty thousand, five hundred thirteen".