13664723 has 2 divisors, whose sum is σ = 13664724. Its totient is φ = 13664722.

The previous prime is 13664711. The next prime is 13664747. The reversal of 13664723 is 32746631.

It is a weak prime.

It is an emirp because it is prime and its reverse (32746631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13664723 - 2⁸ = 13664467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13664723.

It is not a weakly prime, because it can be changed into another prime (13264723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832361 + 6832362.

It is an arithmetic number, because the mean of its divisors is an integer number (6832362).

Almost surely, 2^13664723 is an apocalyptic number.

13664723 is a deficient number, since it is larger than the sum of its proper divisors (1).

13664723 is an equidigital number, since it uses as much as digits as its factorization.

13664723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 13664723 is about 3696.5826110071. The cubic root of 13664723 is about 239.0746952327.

The spelling of 13664723 in words is "thirteen million, six hundred sixty-four thousand, seven hundred twenty-three".