672209 has 2 divisors, whose sum is σ = 672210. Its totient is φ = 672208.

The previous prime is 672193. The next prime is 672223. The reversal of 672209 is 902276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 124609 = 740^2 + 353^2 .

It is a cyclic number.

It is not a de Polignac number, because 672209 - 2⁴ = 672193 is a prime.

It is not a weakly prime, because it can be changed into another prime (672229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336104 + 336105.

It is an arithmetic number, because the mean of its divisors is an integer number (336105).

2⁶⁷²²⁰⁹ is an apocalyptic number.

It is an amenable number.

672209 is a deficient number, since it is larger than the sum of its proper divisors (1).

672209 is an equidigital number, since it uses as much as digits as its factorization.

672209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 672209 is about 819.8835283136. The cubic root of 672209 is about 87.5994624071.

The spelling of 672209 in words is "six hundred seventy-two thousand, two hundred nine".