14978009 has 2 divisors, whose sum is σ = 14978010. Its totient is φ = 14978008.

The previous prime is 14977987. The next prime is 14978011. The reversal of 14978009 is 90087941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10368400 + 4609609 = 3220^2 + 2147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14978009 is a prime.

It is a Sophie Germain prime.

Together with 14978011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (14978059) 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, 7489004 + 7489005.

It is an arithmetic number, because the mean of its divisors is an integer number (7489005).

Almost surely, 2^14978009 is an apocalyptic number.

It is an amenable number.

14978009 is a deficient number, since it is larger than the sum of its proper divisors (1).

14978009 is an equidigital number, since it uses as much as digits as its factorization.

14978009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 14978009 is about 3870.1432790014. The cubic root of 14978009 is about 246.5006274439.

The spelling of 14978009 in words is "fourteen million, nine hundred seventy-eight thousand, nine".