13405823 has 2 divisors, whose sum is σ = 13405824. Its totient is φ = 13405822.

The previous prime is 13405817. The next prime is 13405853. The reversal of 13405823 is 32850431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13405823 - 2⁴ = 13405807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13405792 and 13405801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13405813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702911 + 6702912.

It is an arithmetic number, because the mean of its divisors is an integer number (6702912).

Almost surely, 2^13405823 is an apocalyptic number.

13405823 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405823 is an equidigital number, since it uses as much as digits as its factorization.

13405823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 13405823 is about 3661.3963183463. The cubic root of 13405823 is about 237.5551738851. Note that the first 3 decimals are identical.

The spelling of 13405823 in words is "thirteen million, four hundred five thousand, eight hundred twenty-three".