13726289 has 2 divisors, whose sum is σ = 13726290. Its totient is φ = 13726288.

The previous prime is 13726283. The next prime is 13726301. The reversal of 13726289 is 98262731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 4774225 = 2992^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 13726289 - 2²⁰ = 12677713 is a prime.

It is a super-2 number, since 2×13726289² = 376822019423042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13726283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6863144 + 6863145.

It is an arithmetic number, because the mean of its divisors is an integer number (6863145).

Almost surely, 2^13726289 is an apocalyptic number.

It is an amenable number.

13726289 is a deficient number, since it is larger than the sum of its proper divisors (1).

13726289 is an equidigital number, since it uses as much as digits as its factorization.

13726289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 13726289 is about 3704.9006734324. The cubic root of 13726289 is about 239.4332053102.

The spelling of 13726289 in words is "thirteen million, seven hundred twenty-six thousand, two hundred eighty-nine".