13756789 has 2 divisors, whose sum is σ = 13756790. Its totient is φ = 13756788.

The previous prime is 13756753. The next prime is 13756801. The reversal of 13756789 is 98765731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11276164 + 2480625 = 3358^2 + 1575^2 .

It is an emirp because it is prime and its reverse (98765731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13756789 - 2¹⁵ = 13724021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13756709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6878394 + 6878395.

It is an arithmetic number, because the mean of its divisors is an integer number (6878395).

Almost surely, 2^13756789 is an apocalyptic number.

It is an amenable number.

13756789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13756789 is an equidigital number, since it uses as much as digits as its factorization.

13756789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 13756789 is about 3709.0145591518. The cubic root of 13756789 is about 239.6104153952.

The spelling of 13756789 in words is "thirteen million, seven hundred fifty-six thousand, seven hundred eighty-nine".