2056399 has 2 divisors, whose sum is σ = 2056400. Its totient is φ = 2056398.

The previous prime is 2056381. The next prime is 2056403. The reversal of 2056399 is 9936502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2056399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2056319) 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, 1028199 + 1028200.

It is an arithmetic number, because the mean of its divisors is an integer number (1028200).

2^2056399 is an apocalyptic number.

2056399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2056399 is an equidigital number, since it uses as much as digits as its factorization.

2056399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 2056399 is about 1434.0149929481. The cubic root of 2056399 is about 127.1654487002.

The spelling of 2056399 in words is "two million, fifty-six thousand, three hundred ninety-nine".