26538013 has 2 divisors, whose sum is σ = 26538014. Its totient is φ = 26538012.

The previous prime is 26538011. The next prime is 26538049. The reversal of 26538013 is 31083562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21325924 + 5212089 = 4618^2 + 2283^2 .

It is a cyclic number.

It is not a de Polignac number, because 26538013 - 2¹ = 26538011 is a prime.

It is a super-2 number, since 2×26538013² = 1408532267976338, which contains 22 as substring.

Together with 26538011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26538011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13269006 + 13269007.

It is an arithmetic number, because the mean of its divisors is an integer number (13269007).

Almost surely, 2^26538013 is an apocalyptic number.

It is an amenable number.

26538013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26538013 is an equidigital number, since it uses as much as digits as its factorization.

26538013 is an evil number, because the sum of its binary digits is even.

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

The square root of 26538013 is about 5151.5058963375. The cubic root of 26538013 is about 298.2790840745.

The spelling of 26538013 in words is "twenty-six million, five hundred thirty-eight thousand, thirteen".