2021377 has 2 divisors, whose sum is σ = 2021378. Its totient is φ = 2021376.

The previous prime is 2021339. The next prime is 2021381. The reversal of 2021377 is 7731202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1382976 + 638401 = 1176^2 + 799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021377 is a prime.

It is a super-2 number, since 2×2021377² = 8171929952258, which contains 22 as substring.

It is a Chen prime.

2021377 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2021077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010688 + 1010689.

It is an arithmetic number, because the mean of its divisors is an integer number (1010689).

It is a Proth number, since it is equal to 987 ⋅ 2¹¹ + 1 and 987 < 2¹¹.

2^2021377 is an apocalyptic number.

It is an amenable number.

2021377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021377 is an equidigital number, since it uses as much as digits as its factorization.

2021377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 2021377 is about 1421.7513847364. The cubic root of 2021377 is about 126.4394039743.

Adding to 2021377 its reverse (7731202), we get a palindrome (9752579).

The spelling of 2021377 in words is "two million, twenty-one thousand, three hundred seventy-seven".