13365623 has 2 divisors, whose sum is σ = 13365624. Its totient is φ = 13365622.

The previous prime is 13365581. The next prime is 13365637. The reversal of 13365623 is 32656331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13365623 - 2⁶ = 13365559 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13365673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6682811 + 6682812.

It is an arithmetic number, because the mean of its divisors is an integer number (6682812).

Almost surely, 2^13365623 is an apocalyptic number.

13365623 is a deficient number, since it is larger than the sum of its proper divisors (1).

13365623 is an equidigital number, since it uses as much as digits as its factorization.

13365623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 29.

The square root of 13365623 is about 3655.9024877587. The cubic root of 13365623 is about 237.3174841515.

It can be divided in two parts, 133 and 65623, that added together give a palindrome (65756).

The spelling of 13365623 in words is "thirteen million, three hundred sixty-five thousand, six hundred twenty-three".