2071649 has 2 divisors, whose sum is σ = 2071650. Its totient is φ = 2071648.

The previous prime is 2071631. The next prime is 2071661. The reversal of 2071649 is 9461702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 21025 = 1432^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071649 - 2⁸ = 2071393 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2071669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1035824 + 1035825.

It is an arithmetic number, because the mean of its divisors is an integer number (1035825).

2^2071649 is an apocalyptic number.

It is an amenable number.

2071649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071649 is an equidigital number, since it uses as much as digits as its factorization.

2071649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2071649 is about 1439.3224100249. The cubic root of 2071649 is about 127.4790225644.

The spelling of 2071649 in words is "two million, seventy-one thousand, six hundred forty-nine".