12645623 has 2 divisors, whose sum is σ = 12645624. Its totient is φ = 12645622.

The previous prime is 12645547. The next prime is 12645643. The reversal of 12645623 is 32654621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12645623 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 (12645643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6322811 + 6322812.

It is an arithmetic number, because the mean of its divisors is an integer number (6322812).

Almost surely, 2^12645623 is an apocalyptic number.

12645623 is a deficient number, since it is larger than the sum of its proper divisors (1).

12645623 is an equidigital number, since it uses as much as digits as its factorization.

12645623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 12645623 is about 3556.0684751562. The cubic root of 12645623 is about 232.9771938849.

The spelling of 12645623 in words is "twelve million, six hundred forty-five thousand, six hundred twenty-three".