13643963 has 2 divisors, whose sum is σ = 13643964. Its totient is φ = 13643962.

The previous prime is 13643953. The next prime is 13643977. The reversal of 13643963 is 36934631.

It is a weak prime.

It is an emirp because it is prime and its reverse (36934631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13643963 - 2¹² = 13639867 is a prime.

It is not a weakly prime, because it can be changed into another prime (13643933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6821981 + 6821982.

It is an arithmetic number, because the mean of its divisors is an integer number (6821982).

Almost surely, 2^13643963 is an apocalyptic number.

13643963 is a deficient number, since it is larger than the sum of its proper divisors (1).

13643963 is an equidigital number, since it uses as much as digits as its factorization.

13643963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 13643963 is about 3693.7735447642. The cubic root of 13643963 is about 238.9535632195.

The spelling of 13643963 in words is "thirteen million, six hundred forty-three thousand, nine hundred sixty-three".