2064649 has 2 divisors, whose sum is σ = 2064650. Its totient is φ = 2064648.

The previous prime is 2064619. The next prime is 2064653. The reversal of 2064649 is 9464602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 783225 = 1132^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 2064649 - 2¹⁷ = 1933577 is a prime.

It is a Chen prime.

2064649 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2064649.

It is not a weakly prime, because it can be changed into another prime (2064619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032324 + 1032325.

It is an arithmetic number, because the mean of its divisors is an integer number (1032325).

2^2064649 is an apocalyptic number.

It is an amenable number.

2064649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2064649 is an equidigital number, since it uses as much as digits as its factorization.

2064649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2064649 is about 1436.8886526102. Note that the first 3 decimals coincide. The cubic root of 2064649 is about 127.3352787608.

The spelling of 2064649 in words is "two million, sixty-four thousand, six hundred forty-nine".