4056389 has 2 divisors, whose sum is σ = 4056390. Its totient is φ = 4056388.

The previous prime is 4056383. The next prime is 4056407. The reversal of 4056389 is 9836504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2656900 + 1399489 = 1630^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 4056389 - 2¹⁶ = 3990853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4056383) 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, 2028194 + 2028195.

It is an arithmetic number, because the mean of its divisors is an integer number (2028195).

Almost surely, 2^4056389 is an apocalyptic number.

It is an amenable number.

4056389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4056389 is an equidigital number, since it uses as much as digits as its factorization.

4056389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 4056389 is about 2014.0479140279. The cubic root of 4056389 is about 159.4825601749.

The spelling of 4056389 in words is "four million, fifty-six thousand, three hundred eighty-nine".