103662509 has 2 divisors, whose sum is σ = 103662510. Its totient is φ = 103662508.

The previous prime is 103662497. The next prime is 103662511. The reversal of 103662509 is 905266301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100440484 + 3222025 = 10022^2 + 1795^2 .

It is an emirp because it is prime and its reverse (905266301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103662509 - 2⁸ = 103662253 is a prime.

Together with 103662511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103662529) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51831254 + 51831255.

It is an arithmetic number, because the mean of its divisors is an integer number (51831255).

Almost surely, 2^103662509 is an apocalyptic number.

It is an amenable number.

103662509 is a deficient number, since it is larger than the sum of its proper divisors (1).

103662509 is an equidigital number, since it uses as much as digits as its factorization.

103662509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 103662509 is about 10181.4787236432. The cubic root of 103662509 is about 469.7576976498.

The spelling of 103662509 in words is "one hundred three million, six hundred sixty-two thousand, five hundred nine".