13752209 has 2 divisors, whose sum is σ = 13752210. Its totient is φ = 13752208.

The previous prime is 13752173. The next prime is 13752223. The reversal of 13752209 is 90225731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13712209 + 40000 = 3703^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 13752209 - 2²⁰ = 12703633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13752259) 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, 6876104 + 6876105.

It is an arithmetic number, because the mean of its divisors is an integer number (6876105).

Almost surely, 2^13752209 is an apocalyptic number.

It is an amenable number.

13752209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13752209 is an equidigital number, since it uses as much as digits as its factorization.

13752209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 13752209 is about 3708.3970930848. The cubic root of 13752209 is about 239.5838215558.

The spelling of 13752209 in words is "thirteen million, seven hundred fifty-two thousand, two hundred nine".