13211623 has 2 divisors, whose sum is σ = 13211624. Its totient is φ = 13211622.

The previous prime is 13211603. The next prime is 13211641. The reversal of 13211623 is 32611231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13211623 - 2⁹ = 13211111 is a prime.

It is equal to p₈₆₂₁₀₂ and since 13211623 and 862102 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13211623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605811 + 6605812.

It is an arithmetic number, because the mean of its divisors is an integer number (6605812).

Almost surely, 2^13211623 is an apocalyptic number.

13211623 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211623 is an equidigital number, since it uses as much as digits as its factorization.

13211623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 13211623 is about 3634.7796356863. The cubic root of 13211623 is about 236.4024959105.

Adding to 13211623 its reverse (32611231), we get a palindrome (45822854).

The spelling of 13211623 in words is "thirteen million, two hundred eleven thousand, six hundred twenty-three".