11721593 has 8 divisors (see below), whose sum is σ = 12657288. Its totient is φ = 10790784.

The previous prime is 11721587. The next prime is 11721607. The reversal of 11721593 is 39512711.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 11002489 = 848^2 + 3317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11721593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11721293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4955 + ... + 6927.

It is an arithmetic number, because the mean of its divisors is an integer number (1582161).

Almost surely, 2^11721593 is an apocalyptic number.

11721593 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11721593 is a deficient number, since it is larger than the sum of its proper divisors (935695).

11721593 is a wasteful number, since it uses less digits than its factorization.

11721593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443.

The product of its digits is 1890, while the sum is 29.

The square root of 11721593 is about 3423.6812059536. The cubic root of 11721593 is about 227.1584408814.

The spelling of 11721593 in words is "eleven million, seven hundred twenty-one thousand, five hundred ninety-three".