623345 has 4 divisors (see below), whose sum is σ = 748020. Its totient is φ = 498672.

The previous prime is 623341. The next prime is 623351. The reversal of 623345 is 543326.

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 262144 + 361201 = 512^2 + 601^2 .

It is a cyclic number.

It is not a de Polignac number, because 623345 - 2² = 623341 is a prime.

It is a d-powerful number, because it can be written as 6³ + 2¹⁹ + 3² + 3⁹ + 4⁵ + 5⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 623345.

It is not an unprimeable number, because it can be changed into a prime (623341) 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, 62330 + ... + 62339.

It is an arithmetic number, because the mean of its divisors is an integer number (187005).

2⁶²³³⁴⁵ is an apocalyptic number.

It is an amenable number.

623345 is a deficient number, since it is larger than the sum of its proper divisors (124675).

623345 is a wasteful number, since it uses less digits than its factorization.

623345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124674.

The product of its digits is 2160, while the sum is 23.

The square root of 623345 is about 789.5220072930. The cubic root of 623345 is about 85.4232636851.

The spelling of 623345 in words is "six hundred twenty-three thousand, three hundred forty-five".