12423409 has 2 divisors, whose sum is σ = 12423410. Its totient is φ = 12423408.

The previous prime is 12423407. The next prime is 12423457. The reversal of 12423409 is 90432421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 138384 = 3505^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 12423409 - 2¹ = 12423407 is a prime.

Together with 12423407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12423401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6211704 + 6211705.

It is an arithmetic number, because the mean of its divisors is an integer number (6211705).

Almost surely, 2^12423409 is an apocalyptic number.

It is an amenable number.

12423409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12423409 is an equidigital number, since it uses as much as digits as its factorization.

12423409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 12423409 is about 3524.6856597433. The cubic root of 12423409 is about 231.6044650102.

The spelling of 12423409 in words is "twelve million, four hundred twenty-three thousand, four hundred nine".