705553 has 4 divisors (see below), whose sum is σ = 724660. Its totient is φ = 686448.

The previous prime is 705533. The next prime is 705559. The reversal of 705553 is 355507.

It is a happy number.

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 677329 + 28224 = 823^2 + 168^2 .

It is a cyclic number.

It is not a de Polignac number, because 705553 - 2⁵ = 705521 is a prime.

It is an Ulam number.

It is a Duffinian number.

705553 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (705559) 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 in 3 ways as a sum of consecutive naturals, for example, 9498 + ... + 9571.

It is an arithmetic number, because the mean of its divisors is an integer number (181165).

2⁷⁰⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

705553 is a deficient number, since it is larger than the sum of its proper divisors (19107).

705553 is a wasteful number, since it uses less digits than its factorization.

705553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19106.

The product of its (nonzero) digits is 2625, while the sum is 25.

The square root of 705553 is about 839.9720233436. The cubic root of 705553 is about 89.0245692384.

The spelling of 705553 in words is "seven hundred five thousand, five hundred fifty-three".