103809709 has 2 divisors, whose sum is σ = 103809710. Its totient is φ = 103809708.

The previous prime is 103809661. The next prime is 103809721. The reversal of 103809709 is 907908301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77492809 + 26316900 = 8803^2 + 5130^2 .

It is an emirp because it is prime and its reverse (907908301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103809709 - 2¹³ = 103801517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103809779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51904854 + 51904855.

It is an arithmetic number, because the mean of its divisors is an integer number (51904855).

Almost surely, 2^103809709 is an apocalyptic number.

It is an amenable number.

103809709 is a deficient number, since it is larger than the sum of its proper divisors (1).

103809709 is an equidigital number, since it uses as much as digits as its factorization.

103809709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 103809709 is about 10188.7049716831. The cubic root of 103809709 is about 469.9799433119.

The spelling of 103809709 in words is "one hundred three million, eight hundred nine thousand, seven hundred nine".