655489 has 2 divisors, whose sum is σ = 655490. Its totient is φ = 655488.

The previous prime is 655471. The next prime is 655507. The reversal of 655489 is 984556.

It is a balanced prime because it is at equal distance from previous prime (655471) and next prime (655507).

It can be written as a sum of positive squares in only one way, i.e., 608400 + 47089 = 780^2 + 217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655489 is a prime.

It is not a weakly prime, because it can be changed into another prime (655439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327744 + 327745.

It is an arithmetic number, because the mean of its divisors is an integer number (327745).

655489 is a Friedman number, since it can be written as 9+(8^5+6)*5*4, using all its digits and the basic arithmetic operations.

2⁶⁵⁵⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

655489 is a deficient number, since it is larger than the sum of its proper divisors (1).

655489 is an equidigital number, since it uses as much as digits as its factorization.

655489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 655489 is about 809.6227516566. The cubic root of 655489 is about 86.8670625738.

The spelling of 655489 in words is "six hundred fifty-five thousand, four hundred eighty-nine".