13985669 has 2 divisors, whose sum is σ = 13985670. Its totient is φ = 13985668.

The previous prime is 13985663. The next prime is 13985687. The reversal of 13985669 is 96658931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7924225 + 6061444 = 2815^2 + 2462^2 .

It is a cyclic number.

It is not a de Polignac number, because 13985669 - 2¹² = 13981573 is a prime.

It is a super-2 number, since 2×13985669² = 391197874755122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13985663) 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, 6992834 + 6992835.

It is an arithmetic number, because the mean of its divisors is an integer number (6992835).

Almost surely, 2^13985669 is an apocalyptic number.

It is an amenable number.

13985669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13985669 is an equidigital number, since it uses as much as digits as its factorization.

13985669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 47.

The square root of 13985669 is about 3739.7418360095. The cubic root of 13985669 is about 240.9319608438.

The spelling of 13985669 in words is "thirteen million, nine hundred eighty-five thousand, six hundred sixty-nine".