2206649 has 2 divisors, whose sum is σ = 2206650. Its totient is φ = 2206648.

The previous prime is 2206627. The next prime is 2206657. The reversal of 2206649 is 9466022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 156025 = 1432^2 + 395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2206649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2206619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103324 + 1103325.

It is an arithmetic number, because the mean of its divisors is an integer number (1103325).

2^2206649 is an apocalyptic number.

It is an amenable number.

2206649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2206649 is an equidigital number, since it uses as much as digits as its factorization.

2206649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2206649 is about 1485.4793839027. The cubic root of 2206649 is about 130.1900376441.

The spelling of 2206649 in words is "two million, two hundred six thousand, six hundred forty-nine".