14538509 has 2 divisors, whose sum is σ = 14538510. Its totient is φ = 14538508.

The previous prime is 14538487. The next prime is 14538527. The reversal of 14538509 is 90583541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14273284 + 265225 = 3778^2 + 515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14538509 is a prime.

It is a super-2 number, since 2×14538509² = 422736487886162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14538109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7269254 + 7269255.

It is an arithmetic number, because the mean of its divisors is an integer number (7269255).

Almost surely, 2^14538509 is an apocalyptic number.

It is an amenable number.

14538509 is a deficient number, since it is larger than the sum of its proper divisors (1).

14538509 is an equidigital number, since it uses as much as digits as its factorization.

14538509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 14538509 is about 3812.9396795648. The cubic root of 14538509 is about 244.0656289017.

The spelling of 14538509 in words is "fourteen million, five hundred thirty-eight thousand, five hundred nine".