655219 has 2 divisors, whose sum is σ = 655220. Its totient is φ = 655218.

The previous prime is 655211. The next prime is 655223. The reversal of 655219 is 912556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655219 - 2³ = 655211 is a prime.

It is a super-2 number, since 2×655219² = 858623875922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (655211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327609 + 327610.

It is an arithmetic number, because the mean of its divisors is an integer number (327610).

2⁶⁵⁵²¹⁹ is an apocalyptic number.

655219 is a deficient number, since it is larger than the sum of its proper divisors (1).

655219 is an equidigital number, since it uses as much as digits as its factorization.

655219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 655219 is about 809.4559901564. The cubic root of 655219 is about 86.8551339079.

It can be divided in two parts, 6 and 55219, that added together give a square (55225 = 235²).

The spelling of 655219 in words is "six hundred fifty-five thousand, two hundred nineteen".