11609621 has 2 divisors, whose sum is σ = 11609622. Its totient is φ = 11609620.

The previous prime is 11609567. The next prime is 11609629. The reversal of 11609621 is 12690611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 792100 = 3289^2 + 890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11609621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11609629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5804810 + 5804811.

It is an arithmetic number, because the mean of its divisors is an integer number (5804811).

Almost surely, 2^11609621 is an apocalyptic number.

It is an amenable number.

11609621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11609621 is an equidigital number, since it uses as much as digits as its factorization.

11609621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 11609621 is about 3407.2893918774. The cubic root of 11609621 is about 226.4328054636.

The spelling of 11609621 in words is "eleven million, six hundred nine thousand, six hundred twenty-one".