1117309 has 2 divisors, whose sum is σ = 1117310. Its totient is φ = 1117308.

The previous prime is 1117307. The next prime is 1117321. The reversal of 1117309 is 9037111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 334084 = 885^2 + 578^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117309 - 2¹ = 1117307 is a prime.

Together with 1117307, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1117309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558654 + 558655.

It is an arithmetic number, because the mean of its divisors is an integer number (558655).

2^1117309 is an apocalyptic number.

It is an amenable number.

1117309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117309 is an equidigital number, since it uses as much as digits as its factorization.

1117309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1117309 is about 1057.0283818328. The cubic root of 1117309 is about 103.7666427069.

The spelling of 1117309 in words is "one million, one hundred seventeen thousand, three hundred nine".