656273 has 2 divisors, whose sum is σ = 656274. Its totient is φ = 656272.

The previous prime is 656267. The next prime is 656291. The reversal of 656273 is 372656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 350464 + 305809 = 592^2 + 553^2 .

It is a cyclic number.

It is not a de Polignac number, because 656273 - 2¹⁸ = 394129 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6² + 5⁷ + 2³ + 6⁶ + 7 + 3¹² .

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328136 + 328137.

It is an arithmetic number, because the mean of its divisors is an integer number (328137).

656273 is a Friedman number, since it can be written as 23+7*6*5^6, using all its digits and the basic arithmetic operations.

2⁶⁵⁶²⁷³ is an apocalyptic number.

It is an amenable number.

656273 is a deficient number, since it is larger than the sum of its proper divisors (1).

656273 is an equidigital number, since it uses as much as digits as its factorization.

656273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 29.

The square root of 656273 is about 810.1067830848. The cubic root of 656273 is about 86.9016813308.

It can be divided in two parts, 656 and 273, that added together give a palindrome (929).

The spelling of 656273 in words is "six hundred fifty-six thousand, two hundred seventy-three".