4093813 has 2 divisors, whose sum is σ = 4093814. Its totient is φ = 4093812.

The previous prime is 4093811. The next prime is 4093823. The reversal of 4093813 is 3183904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4088484 + 5329 = 2022^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 4093813 - 2¹ = 4093811 is a prime.

Together with 4093811, 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 (4093811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2046906 + 2046907.

It is an arithmetic number, because the mean of its divisors is an integer number (2046907).

Almost surely, 2^4093813 is an apocalyptic number.

It is an amenable number.

4093813 is a deficient number, since it is larger than the sum of its proper divisors (1).

4093813 is an equidigital number, since it uses as much as digits as its factorization.

4093813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 4093813 is about 2023.3173255819. The cubic root of 4093813 is about 159.9715183678.

Subtracting from 4093813 its reverse (3183904), we obtain a palindrome (909909).

The spelling of 4093813 in words is "four million, ninety-three thousand, eight hundred thirteen".