7638823 has 2 divisors, whose sum is σ = 7638824. Its totient is φ = 7638822.

The previous prime is 7638791. The next prime is 7638853. The reversal of 7638823 is 3288367.

It is a strong prime.

It is an emirp because it is prime and its reverse (3288367) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7638823 - 2⁵ = 7638791 is a prime.

7638823 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7638853) 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, 3819411 + 3819412.

It is an arithmetic number, because the mean of its divisors is an integer number (3819412).

Almost surely, 2^7638823 is an apocalyptic number.

7638823 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638823 is an equidigital number, since it uses as much as digits as its factorization.

7638823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 7638823 is about 2763.8420721886. The cubic root of 7638823 is about 196.9437254983.

The spelling of 7638823 in words is "seven million, six hundred thirty-eight thousand, eight hundred twenty-three".