103138509 has 16 divisors (see below), whose sum is σ = 143740800. Its totient is φ = 65657856.

The previous prime is 103138489. The next prime is 103138543. The reversal of 103138509 is 905831301.

It is a happy number.

It is not a de Polignac number, because 103138509 - 2⁸ = 103138253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103138559) 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 in 15 ways as a sum of consecutive naturals, for example, 63297 + ... + 64905.

It is an arithmetic number, because the mean of its divisors is an integer number (8983800).

Almost surely, 2^103138509 is an apocalyptic number.

It is an amenable number.

103138509 is a deficient number, since it is larger than the sum of its proper divisors (40602291).

103138509 is a wasteful number, since it uses less digits than its factorization.

103138509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 103138509 is about 10155.7131211944. The cubic root of 103138509 is about 468.9648396165.

The spelling of 103138509 in words is "one hundred three million, one hundred thirty-eight thousand, five hundred nine".