2020399 has 6 divisors (see below), whose sum is σ = 2146544. Its totient is φ = 1901280.

The previous prime is 2020393. The next prime is 2020409. The reversal of 2020399 is 9930202.

It is not a de Polignac number, because 2020399 - 2³ = 2020391 is a prime.

It is a Duffinian number.

2020399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020391) 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 in 5 ways as a sum of consecutive naturals, for example, 3207 + ... + 3784.

2^2020399 is an apocalyptic number.

2020399 is a deficient number, since it is larger than the sum of its proper divisors (126145).

2020399 is an equidigital number, since it uses as much as digits as its factorization.

2020399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025 (or 7008 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 2020399 is about 1421.4074011345. The cubic root of 2020399 is about 126.4190090182.

It can be divided in two parts, 20203 and 99, that added together give a palindrome (20302).

The spelling of 2020399 in words is "two million, twenty thousand, three hundred ninety-nine".