13331623 has 2 divisors, whose sum is σ = 13331624. Its totient is φ = 13331622.

The previous prime is 13331573. The next prime is 13331641. The reversal of 13331623 is 32613331.

It is a strong prime.

It is an emirp because it is prime and its reverse (32613331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13331594 and 13331603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665811 + 6665812.

It is an arithmetic number, because the mean of its divisors is an integer number (6665812).

Almost surely, 2^13331623 is an apocalyptic number.

13331623 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331623 is an equidigital number, since it uses as much as digits as its factorization.

13331623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 22.

The square root of 13331623 is about 3651.2495121533. The cubic root of 13331623 is about 237.1160807438.

Adding to 13331623 its reverse (32613331), we get a palindrome (45944954).

The spelling of 13331623 in words is "thirteen million, three hundred thirty-one thousand, six hundred twenty-three".