2006549 has 2 divisors, whose sum is σ = 2006550. Its totient is φ = 2006548.

The previous prime is 2006507. The next prime is 2006573. The reversal of 2006549 is 9456002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036324 + 970225 = 1018^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006549 - 2¹² = 2002453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2006579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003274 + 1003275.

It is an arithmetic number, because the mean of its divisors is an integer number (1003275).

2^2006549 is an apocalyptic number.

It is an amenable number.

2006549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006549 is an equidigital number, since it uses as much as digits as its factorization.

2006549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2006549 is about 1416.5270911635. The cubic root of 2006549 is about 126.1294755411.

The spelling of 2006549 in words is "two million, six thousand, five hundred forty-nine".