103723309 has 2 divisors, whose sum is σ = 103723310. Its totient is φ = 103723308.

The previous prime is 103723297. The next prime is 103723331. The reversal of 103723309 is 903327301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89359209 + 14364100 = 9453^2 + 3790^2 .

It is an emirp because it is prime and its reverse (903327301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103723309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103723379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51861654 + 51861655.

It is an arithmetic number, because the mean of its divisors is an integer number (51861655).

Almost surely, 2^103723309 is an apocalyptic number.

It is an amenable number.

103723309 is a deficient number, since it is larger than the sum of its proper divisors (1).

103723309 is an equidigital number, since it uses as much as digits as its factorization.

103723309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 103723309 is about 10184.4640997944. The cubic root of 103723309 is about 469.8495202583.

The spelling of 103723309 in words is "one hundred three million, seven hundred twenty-three thousand, three hundred nine".