7643873 has 2 divisors, whose sum is σ = 7643874. Its totient is φ = 7643872.

The previous prime is 7643869. The next prime is 7643879. The reversal of 7643873 is 3783467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5650129 + 1993744 = 2377^2 + 1412^2 .

It is an emirp because it is prime and its reverse (3783467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7643873 - 2² = 7643869 is a prime.

It is not a weakly prime, because it can be changed into another prime (7643879) 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, 3821936 + 3821937.

It is an arithmetic number, because the mean of its divisors is an integer number (3821937).

Almost surely, 2^7643873 is an apocalyptic number.

It is an amenable number.

7643873 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643873 is an equidigital number, since it uses as much as digits as its factorization.

7643873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 7643873 is about 2764.7555045609. The cubic root of 7643873 is about 196.9871155479.

The spelling of 7643873 in words is "seven million, six hundred forty-three thousand, eight hundred seventy-three".