2206657 has 2 divisors, whose sum is σ = 2206658. Its totient is φ = 2206656.

The previous prime is 2206649. The next prime is 2206663. The reversal of 2206657 is 7566022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2005056 + 201601 = 1416^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 2206657 - 2³ = 2206649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2206627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103328 + 1103329.

It is an arithmetic number, because the mean of its divisors is an integer number (1103329).

2^2206657 is an apocalyptic number.

It is an amenable number.

2206657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2206657 is an equidigital number, since it uses as much as digits as its factorization.

2206657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2206657 is about 1485.4820766337. The cubic root of 2206657 is about 130.1901949746.

It can be divided in two parts, 2 and 206657, that multiplied together give a palindrome (413314).

The spelling of 2206657 in words is "two million, two hundred six thousand, six hundred fifty-seven".