103720709 has 4 divisors (see below), whose sum is σ = 104258316. Its totient is φ = 103183104.

The previous prime is 103720667. The next prime is 103720763. The reversal of 103720709 is 907027301.

It is a happy number.

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 60450625 + 43270084 = 7775^2 + 6578^2 .

It is a cyclic number.

It is not a de Polignac number, because 103720709 - 2²⁰ = 102672133 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 (103720789) 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 in 3 ways as a sum of consecutive naturals, for example, 268514 + ... + 268899.

It is an arithmetic number, because the mean of its divisors is an integer number (26064579).

Almost surely, 2^103720709 is an apocalyptic number.

It is an amenable number.

103720709 is a deficient number, since it is larger than the sum of its proper divisors (537607).

103720709 is an equidigital number, since it uses as much as digits as its factorization.

103720709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537606.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 103720709 is about 10184.3364535938. The cubic root of 103720709 is about 469.8455943681.

The spelling of 103720709 in words is "one hundred three million, seven hundred twenty thousand, seven hundred nine".