13988969 has 2 divisors, whose sum is σ = 13988970. Its totient is φ = 13988968.

The previous prime is 13988963. The next prime is 13988987. The reversal of 13988969 is 96988931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 1369 = 3740^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 13988969 - 2⁸ = 13988713 is a prime.

It is a super-2 number, since 2×13988969² = 391382507365922, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 13988969.

It is not a weakly prime, because it can be changed into another prime (13988963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994484 + 6994485.

It is an arithmetic number, because the mean of its divisors is an integer number (6994485).

Almost surely, 2^13988969 is an apocalyptic number.

It is an amenable number.

13988969 is a deficient number, since it is larger than the sum of its proper divisors (1).

13988969 is an equidigital number, since it uses as much as digits as its factorization.

13988969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 13988969 is about 3740.1830169124. The cubic root of 13988969 is about 240.9509091197.

The spelling of 13988969 in words is "thirteen million, nine hundred eighty-eight thousand, nine hundred sixty-nine".