103731809 has 2 divisors, whose sum is σ = 103731810. Its totient is φ = 103731808.

The previous prime is 103731751. The next prime is 103731821. The reversal of 103731809 is 908137301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82755409 + 20976400 = 9097^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 103731809 - 2⁸ = 103731553 is a prime.

It is not a weakly prime, because it can be changed into another prime (103731889) 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 as a sum of consecutive naturals, namely, 51865904 + 51865905.

It is an arithmetic number, because the mean of its divisors is an integer number (51865905).

Almost surely, 2^103731809 is an apocalyptic number.

It is an amenable number.

103731809 is a deficient number, since it is larger than the sum of its proper divisors (1).

103731809 is an equidigital number, since it uses as much as digits as its factorization.

103731809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 103731809 is about 10184.8813935166. The cubic root of 103731809 is about 469.8623544414.

The spelling of 103731809 in words is "one hundred three million, seven hundred thirty-one thousand, eight hundred nine".