26722613 has 4 divisors (see below), whose sum is σ = 26756940. Its totient is φ = 26688288.

The previous prime is 26722583. The next prime is 26722643. The reversal of 26722613 is 31622762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31622762 = 2 ⋅15811381.

It is an interprime number because it is at equal distance from previous prime (26722583) and next prime (26722643).

It can be written as a sum of positive squares in 2 ways, for example, as 14730244 + 11992369 = 3838^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 26722613 - 2²² = 22528309 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 (26722643) 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, 15968 + ... + 17561.

It is an arithmetic number, because the mean of its divisors is an integer number (6689235).

Almost surely, 2^26722613 is an apocalyptic number.

It is an amenable number.

26722613 is a deficient number, since it is larger than the sum of its proper divisors (34327).

26722613 is an equidigital number, since it uses as much as digits as its factorization.

26722613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34326.

The product of its digits is 6048, while the sum is 29.

The square root of 26722613 is about 5169.3919371624. The cubic root of 26722613 is about 298.9691022982.

The spelling of 26722613 in words is "twenty-six million, seven hundred twenty-two thousand, six hundred thirteen".