13988789 has 2 divisors, whose sum is σ = 13988790. Its totient is φ = 13988788.

The previous prime is 13988783. The next prime is 13988801. The reversal of 13988789 is 98788931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10510564 + 3478225 = 3242^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 13988789 - 2¹⁶ = 13923253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13988789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13988783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994394 + 6994395.

It is an arithmetic number, because the mean of its divisors is an integer number (6994395).

Almost surely, 2^13988789 is an apocalyptic number.

It is an amenable number.

13988789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13988789 is an equidigital number, since it uses as much as digits as its factorization.

13988789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 53.

The square root of 13988789 is about 3740.1589538414. The cubic root of 13988789 is about 240.9498756543.

The spelling of 13988789 in words is "thirteen million, nine hundred eighty-eight thousand, seven hundred eighty-nine".