11623609 has 2 divisors, whose sum is σ = 11623610. Its totient is φ = 11623608.

The previous prime is 11623583. The next prime is 11623621. The reversal of 11623609 is 90632611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 29584 = 3405^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 11623609 - 2⁹ = 11623097 is a prime.

It is not a weakly prime, because it can be changed into another prime (11623669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5811804 + 5811805.

It is an arithmetic number, because the mean of its divisors is an integer number (5811805).

Almost surely, 2^11623609 is an apocalyptic number.

It is an amenable number.

11623609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11623609 is an equidigital number, since it uses as much as digits as its factorization.

11623609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 11623609 is about 3409.3414320071. The cubic root of 11623609 is about 226.5237091162.

The spelling of 11623609 in words is "eleven million, six hundred twenty-three thousand, six hundred nine".