11623813 has 2 divisors, whose sum is σ = 11623814. Its totient is φ = 11623812.

The previous prime is 11623793. The next prime is 11623817. The reversal of 11623813 is 31832611.

11623813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6880129 + 4743684 = 2623^2 + 2178^2 .

It is an emirp because it is prime and its reverse (31832611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11623813 - 2⁹ = 11623301 is a prime.

It is a super-2 number, since 2×11623813² = 270226057317938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11623817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5811906 + 5811907.

It is an arithmetic number, because the mean of its divisors is an integer number (5811907).

Almost surely, 2^11623813 is an apocalyptic number.

It is an amenable number.

11623813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11623813 is an equidigital number, since it uses as much as digits as its factorization.

11623813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 11623813 is about 3409.3713496772. The cubic root of 11623813 is about 226.5250343090.

The spelling of 11623813 in words is "eleven million, six hundred twenty-three thousand, eight hundred thirteen".