655553 has 4 divisors (see below), whose sum is σ = 658260. Its totient is φ = 652848.

The previous prime is 655547. The next prime is 655559. The reversal of 655553 is 355556.

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

It is an interprime number because it is at equal distance from previous prime (655547) and next prime (655559).

It can be written as a sum of positive squares in 2 ways, for example, as 332929 + 322624 = 577^2 + 568^2 .

It is a cyclic number.

It is not a de Polignac number, because 655553 - 2⁶ = 655489 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655553.

It is not an unprimeable number, because it can be changed into a prime (655559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (164565).

2⁶⁵⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

655553 is a deficient number, since it is larger than the sum of its proper divisors (2707).

655553 is a wasteful number, since it uses less digits than its factorization.

655553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706.

The product of its digits is 11250, while the sum is 29.

The square root of 655553 is about 809.6622752728. The cubic root of 655553 is about 86.8698896292.

The spelling of 655553 in words is "six hundred fifty-five thousand, five hundred fifty-three".