662209 has 4 divisors (see below), whose sum is σ = 664020. Its totient is φ = 660400.

The previous prime is 662203. The next prime is 662227. The reversal of 662209 is 902266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 462400 = 447^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 662209 - 2⁵ = 662177 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (662203) 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, 142 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (166005).

2⁶⁶²²⁰⁹ is an apocalyptic number.

It is an amenable number.

662209 is a deficient number, since it is larger than the sum of its proper divisors (1811).

662209 is a wasteful number, since it uses less digits than its factorization.

662209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 662209 is about 813.7622502918. The cubic root of 662209 is about 87.1629043600.

The spelling of 662209 in words is "six hundred sixty-two thousand, two hundred nine".