13261789 has 2 divisors, whose sum is σ = 13261790. Its totient is φ = 13261788.

The previous prime is 13261783. The next prime is 13261813. The reversal of 13261789 is 98716231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 5139289 = 2850^2 + 2267^2 .

It is an emirp because it is prime and its reverse (98716231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13261789 - 2⁵ = 13261757 is a prime.

It is a super-3 number, since 3×13261789³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13261783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630894 + 6630895.

It is an arithmetic number, because the mean of its divisors is an integer number (6630895).

Almost surely, 2^13261789 is an apocalyptic number.

It is an amenable number.

13261789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13261789 is an equidigital number, since it uses as much as digits as its factorization.

13261789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 13261789 is about 3641.6739282918. The cubic root of 13261789 is about 236.7013335010.

The spelling of 13261789 in words is "thirteen million, two hundred sixty-one thousand, seven hundred eighty-nine".