4378813 has 2 divisors, whose sum is σ = 4378814. Its totient is φ = 4378812.

The previous prime is 4378811. The next prime is 4378817. The reversal of 4378813 is 3188734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3526884 + 851929 = 1878^2 + 923^2 .

It is a cyclic number.

It is not a de Polignac number, because 4378813 - 2¹ = 4378811 is a prime.

Together with 4378811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4378811) 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, 2189406 + 2189407.

It is an arithmetic number, because the mean of its divisors is an integer number (2189407).

Almost surely, 2^4378813 is an apocalyptic number.

It is an amenable number.

4378813 is a deficient number, since it is larger than the sum of its proper divisors (1).

4378813 is an equidigital number, since it uses as much as digits as its factorization.

4378813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 4378813 is about 2092.5613491604. The cubic root of 4378813 is about 163.6008162871.

The spelling of 4378813 in words is "four million, three hundred seventy-eight thousand, eight hundred thirteen".