1113543509 has 4 divisors (see below), whose sum is σ = 1199200716. Its totient is φ = 1027886304.

The previous prime is 1113543491. The next prime is 1113543617. The reversal of 1113543509 is 9053453111.

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 415262884 + 698280625 = 20378^2 + 26425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113543509 - 2¹⁶ = 1113477973 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 (1113543209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42828584 + ... + 42828609.

It is an arithmetic number, because the mean of its divisors is an integer number (299800179).

Almost surely, 2^1113543509 is an apocalyptic number.

It is an amenable number.

1113543509 is a deficient number, since it is larger than the sum of its proper divisors (85657207).

1113543509 is an equidigital number, since it uses as much as digits as its factorization.

1113543509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85657206.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 1113543509 is about 33369.7993551055. The cubic root of 1113543509 is about 1036.4994203761.

The spelling of 1113543509 in words is "one billion, one hundred thirteen million, five hundred forty-three thousand, five hundred nine".