13278493 has 2 divisors, whose sum is σ = 13278494. Its totient is φ = 13278492.

The previous prime is 13278439. The next prime is 13278497. The reversal of 13278493 is 39487231.

Together with previous prime (13278439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12201049 + 1077444 = 3493^2 + 1038^2 .

It is a cyclic number.

It is not a de Polignac number, because 13278493 - 2⁹ = 13277981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13278497) 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 as a sum of consecutive naturals, namely, 6639246 + 6639247.

It is an arithmetic number, because the mean of its divisors is an integer number (6639247).

Almost surely, 2^13278493 is an apocalyptic number.

It is an amenable number.

13278493 is a deficient number, since it is larger than the sum of its proper divisors (1).

13278493 is an equidigital number, since it uses as much as digits as its factorization.

13278493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 13278493 is about 3643.9666573667. The cubic root of 13278493 is about 236.8006715364.

The spelling of 13278493 in words is "thirteen million, two hundred seventy-eight thousand, four hundred ninety-three".