11511623 has 2 divisors, whose sum is σ = 11511624. Its totient is φ = 11511622.

The previous prime is 11511607. The next prime is 11511679. The reversal of 11511623 is 32611511.

It is a weak prime.

It is an emirp because it is prime and its reverse (32611511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11511623 - 2⁴ = 11511607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11511595 and 11511604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11511823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5755811 + 5755812.

It is an arithmetic number, because the mean of its divisors is an integer number (5755812).

Almost surely, 2^11511623 is an apocalyptic number.

11511623 is a deficient number, since it is larger than the sum of its proper divisors (1).

11511623 is an equidigital number, since it uses as much as digits as its factorization.

11511623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 11511623 is about 3392.8782766259. The cubic root of 11511623 is about 225.7938901928.

The spelling of 11511623 in words is "eleven million, five hundred eleven thousand, six hundred twenty-three".