13636789 has 2 divisors, whose sum is σ = 13636790. Its totient is φ = 13636788.

The previous prime is 13636787. The next prime is 13636853. The reversal of 13636789 is 98763631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 1034289 = 3550^2 + 1017^2 .

It is an emirp because it is prime and its reverse (98763631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13636789 - 2¹ = 13636787 is a prime.

Together with 13636787, 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 (13636787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6818394 + 6818395.

It is an arithmetic number, because the mean of its divisors is an integer number (6818395).

Almost surely, 2^13636789 is an apocalyptic number.

It is an amenable number.

13636789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13636789 is an equidigital number, since it uses as much as digits as its factorization.

13636789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 13636789 is about 3692.8023234395. The cubic root of 13636789 is about 238.9116752577.

The spelling of 13636789 in words is "thirteen million, six hundred thirty-six thousand, seven hundred eighty-nine".