11573539 has 2 divisors, whose sum is σ = 11573540. Its totient is φ = 11573538.

The previous prime is 11573519. The next prime is 11573567. The reversal of 11573539 is 93537511.

It is a weak prime.

It is an emirp because it is prime and its reverse (93537511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11573539 - 2⁷ = 11573411 is a prime.

It is not a weakly prime, because it can be changed into another prime (11573519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5786769 + 5786770.

It is an arithmetic number, because the mean of its divisors is an integer number (5786770).

Almost surely, 2^11573539 is an apocalyptic number.

11573539 is a deficient number, since it is larger than the sum of its proper divisors (1).

11573539 is an equidigital number, since it uses as much as digits as its factorization.

11573539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14175, while the sum is 34.

The square root of 11573539 is about 3401.9904467826. The cubic root of 11573539 is about 226.1979822011.

The spelling of 11573539 in words is "eleven million, five hundred seventy-three thousand, five hundred thirty-nine".