12209623 has 2 divisors, whose sum is σ = 12209624. Its totient is φ = 12209622.

The previous prime is 12209591. The next prime is 12209627. The reversal of 12209623 is 32690221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12209623 - 2⁵ = 12209591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12209627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6104811 + 6104812.

It is an arithmetic number, because the mean of its divisors is an integer number (6104812).

Almost surely, 2^12209623 is an apocalyptic number.

12209623 is a deficient number, since it is larger than the sum of its proper divisors (1).

12209623 is an equidigital number, since it uses as much as digits as its factorization.

12209623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 12209623 is about 3494.2270962260. The cubic root of 12209623 is about 230.2682629165.

Adding to 12209623 its reverse (32690221), we get a palindrome (44899844).

The spelling of 12209623 in words is "twelve million, two hundred nine thousand, six hundred twenty-three".