2020397 has 4 divisors (see below), whose sum is σ = 2025276. Its totient is φ = 2015520.

The previous prime is 2020393. The next prime is 2020409. The reversal of 2020397 is 7930202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1713481 + 306916 = 1309^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020397 - 2² = 2020393 is a prime.

It is a Duffinian 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1754 + ... + 2667.

It is an arithmetic number, because the mean of its divisors is an integer number (506319).

2^2020397 is an apocalyptic number.

It is an amenable number.

2020397 is a deficient number, since it is larger than the sum of its proper divisors (4879).

2020397 is an equidigital number, since it uses as much as digits as its factorization.

2020397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 2020397 is about 1421.4066976063. The cubic root of 2020397 is about 126.4189673040.

Adding to 2020397 its reverse (7930202), we get a palindrome (9950599).

The spelling of 2020397 in words is "two million, twenty thousand, three hundred ninety-seven".