11043661 has 2 divisors, whose sum is σ = 11043662. Its totient is φ = 11043660.

The previous prime is 11043631. The next prime is 11043667. The reversal of 11043661 is 16634011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6502500 + 4541161 = 2550^2 + 2131^2 .

It is a cyclic number.

It is not a de Polignac number, because 11043661 - 2²³ = 2655053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11043667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521830 + 5521831.

It is an arithmetic number, because the mean of its divisors is an integer number (5521831).

Almost surely, 2^11043661 is an apocalyptic number.

It is an amenable number.

11043661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11043661 is an equidigital number, since it uses as much as digits as its factorization.

11043661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 11043661 is about 3323.2004152624. The cubic root of 11043661 is about 222.6918666524.

Adding to 11043661 its reverse (16634011), we get a palindrome (27677672).

The spelling of 11043661 in words is "eleven million, forty-three thousand, six hundred sixty-one".