1113509 has 2 divisors, whose sum is σ = 1113510. Its totient is φ = 1113508.

The previous prime is 1113491. The next prime is 1113521. The reversal of 1113509 is 9053111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 484 = 1055^2 + 22^2 .

It is an emirp because it is prime and its reverse (9053111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113509 - 2⁸ = 1113253 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556754 + 556755.

It is an arithmetic number, because the mean of its divisors is an integer number (556755).

2^1113509 is an apocalyptic number.

It is an amenable number.

1113509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113509 is an equidigital number, since it uses as much as digits as its factorization.

1113509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1113509 is about 1055.2293589547. The cubic root of 1113509 is about 103.6488713138.

The spelling of 1113509 in words is "one million, one hundred thirteen thousand, five hundred nine".