655513 has 4 divisors (see below), whose sum is σ = 661428. Its totient is φ = 649600.

The previous prime is 655511. The next prime is 655517. The reversal of 655513 is 315556.

655513 = 572² + 573².

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

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 327184 = 573^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 655513 - 2¹ = 655511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2788 + ... + 3013.

It is an arithmetic number, because the mean of its divisors is an integer number (165357).

2⁶⁵⁵⁵¹³ is an apocalyptic number.

655513 is the 573-rd centered square number.

It is an amenable number.

655513 is a deficient number, since it is larger than the sum of its proper divisors (5915).

655513 is a wasteful number, since it uses less digits than its factorization.

655513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5914.

The product of its digits is 2250, while the sum is 25.

The square root of 655513 is about 809.6375732388. The cubic root of 655513 is about 86.8681227411.

The spelling of 655513 in words is "six hundred fifty-five thousand, five hundred thirteen".