2206637 has 4 divisors (see below), whose sum is σ = 2213916. Its totient is φ = 2199360.

The previous prime is 2206627. The next prime is 2206649. The reversal of 2206637 is 7366022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7366022 = 2 ⋅3683011.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 1371241 = 914^2 + 1171^2 .

It is a cyclic number.

It is not a de Polignac number, because 2206637 - 2⁴ = 2206621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2206627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3164 + ... + 3797.

It is an arithmetic number, because the mean of its divisors is an integer number (553479).

2^2206637 is an apocalyptic number.

It is an amenable number.

2206637 is a deficient number, since it is larger than the sum of its proper divisors (7279).

2206637 is an equidigital number, since it uses as much as digits as its factorization.

2206637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7278.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 2206637 is about 1485.4753447971. The cubic root of 2206637 is about 130.1898016478.

The spelling of 2206637 in words is "two million, two hundred six thousand, six hundred thirty-seven".