103921509 has 8 divisors (see below), whose sum is σ = 139219552. Its totient is φ = 68952240.

The previous prime is 103921501. The next prime is 103921513. The reversal of 103921509 is 905129301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 103921509 - 2³ = 103921501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103921501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81454 + ... + 82719.

It is an arithmetic number, because the mean of its divisors is an integer number (17402444).

Almost surely, 2^103921509 is an apocalyptic number.

It is an amenable number.

103921509 is a deficient number, since it is larger than the sum of its proper divisors (35298043).

103921509 is a wasteful number, since it uses less digits than its factorization.

103921509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164387.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 103921509 is about 10194.1899629152. The cubic root of 103921509 is about 470.1486009669.

The spelling of 103921509 in words is "one hundred three million, nine hundred twenty-one thousand, five hundred nine".