103724309 has 4 divisors (see below), whose sum is σ = 111703116. Its totient is φ = 95745504.

The previous prime is 103724303. The next prime is 103724321. The reversal of 103724309 is 903427301.

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 51523684 + 52200625 = 7178^2 + 7225^2 .

It is a cyclic number.

It is not a de Polignac number, because 103724309 - 2¹⁶ = 103658773 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 (103724303) 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, 3989384 + ... + 3989409.

It is an arithmetic number, because the mean of its divisors is an integer number (27925779).

Almost surely, 2^103724309 is an apocalyptic number.

It is an amenable number.

103724309 is a deficient number, since it is larger than the sum of its proper divisors (7978807).

103724309 is an equidigital number, since it uses as much as digits as its factorization.

103724309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7978806.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 103724309 is about 10184.5131940609. The cubic root of 103724309 is about 469.8510301986.

The spelling of 103724309 in words is "one hundred three million, seven hundred twenty-four thousand, three hundred nine".