14278740209 has 2 divisors, whose sum is σ = 14278740210. Its totient is φ = 14278740208.

The previous prime is 14278740199. The next prime is 14278740211. The reversal of 14278740209 is 90204787241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7933821184 + 6344919025 = 89072^2 + 79655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14278740209 is a prime.

It is a super-2 number, since 2×14278740209² (a number of 21 digits) contains 22 as substring.

Together with 14278740211, it forms a pair of twin primes.

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 14278740209.

It is not a weakly prime, because it can be changed into another prime (14278740299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7139370104 + 7139370105.

It is an arithmetic number, because the mean of its divisors is an integer number (7139370105).

Almost surely, 2^14278740209 is an apocalyptic number.

It is an amenable number.

14278740209 is a deficient number, since it is larger than the sum of its proper divisors (1).

14278740209 is an equidigital number, since it uses as much as digits as its factorization.

14278740209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 14278740209 in words is "fourteen billion, two hundred seventy-eight million, seven hundred forty thousand, two hundred nine".