12623609 has 2 divisors, whose sum is σ = 12623610. Its totient is φ = 12623608.

The previous prime is 12623579. The next prime is 12623621. The reversal of 12623609 is 90632621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9784384 + 2839225 = 3128^2 + 1685^2 .

It is an emirp because it is prime and its reverse (90632621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12623609 is a prime.

It is equal to p₈₂₆₂₅₆ and since 12623609 and 826256 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12623629) 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, 6311804 + 6311805.

It is an arithmetic number, because the mean of its divisors is an integer number (6311805).

Almost surely, 2^12623609 is an apocalyptic number.

It is an amenable number.

12623609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12623609 is an equidigital number, since it uses as much as digits as its factorization.

12623609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 12623609 is about 3552.9718546591. The cubic root of 12623609 is about 232.8419233926.

The spelling of 12623609 in words is "twelve million, six hundred twenty-three thousand, six hundred nine".