11583661 has 2 divisors, whose sum is σ = 11583662. Its totient is φ = 11583660.

The previous prime is 11583653. The next prime is 11583679. The reversal of 11583661 is 16638511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 2992900 = 2931^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 11583661 - 2³ = 11583653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11583601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5791830 + 5791831.

It is an arithmetic number, because the mean of its divisors is an integer number (5791831).

Almost surely, 2^11583661 is an apocalyptic number.

It is an amenable number.

11583661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11583661 is an equidigital number, since it uses as much as digits as its factorization.

11583661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 11583661 is about 3403.4777801537. The cubic root of 11583661 is about 226.2639058230.

The spelling of 11583661 in words is "eleven million, five hundred eighty-three thousand, six hundred sixty-one".