• 103909² = 10797080281 is an anagram of the next square 103910² = 10797288100.

---

103909 has 4 divisors (see below), whose sum is σ = 111916. Its totient is φ = 95904.

The previous prime is 103903. The next prime is 103913. The reversal of 103909 is 909301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12100 + 91809 = 110^2 + 303^2 .

It is a cyclic number.

It is not a de Polignac number, because 103909 - 2¹³ = 95717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 103909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984 + ... + 4009.

It is an arithmetic number, because the mean of its divisors is an integer number (27979).

2¹⁰³⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

103909 is a deficient number, since it is larger than the sum of its proper divisors (8007).

103909 is an equidigital number, since it uses as much as digits as its factorization.

103909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8006.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 103909 is about 322.3491895445. The cubic root of 103909 is about 47.0129736329.

The spelling of 103909 in words is "one hundred three thousand, nine hundred nine".