2020657 has 2 divisors, whose sum is σ = 2020658. Its totient is φ = 2020656.

The previous prime is 2020621. The next prime is 2020661. The reversal of 2020657 is 7560202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1418481 + 602176 = 1191^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020657 - 2¹⁵ = 1987889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2020687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010328 + 1010329.

It is an arithmetic number, because the mean of its divisors is an integer number (1010329).

2^2020657 is an apocalyptic number.

It is an amenable number.

2020657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020657 is an equidigital number, since it uses as much as digits as its factorization.

2020657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2020657 is about 1421.4981533579. The cubic root of 2020657 is about 126.4243899217.

Adding to 2020657 its reverse (7560202), we get a palindrome (9580859).

The spelling of 2020657 in words is "two million, twenty thousand, six hundred fifty-seven".