623305 has 8 divisors (see below), whose sum is σ = 792072. Its totient is φ = 469248.

The previous prime is 623303. The next prime is 623321. The reversal of 623305 is 503326.

It can be written as a sum of positive squares in 4 ways, for example, as 8649 + 614656 = 93^2 + 784^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 623305 - 2¹ = 623303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3582 + ... + 3751.

It is an arithmetic number, because the mean of its divisors is an integer number (99009).

2⁶²³³⁰⁵ is an apocalyptic number.

It is an amenable number.

623305 is a deficient number, since it is larger than the sum of its proper divisors (168767).

623305 is a wasteful number, since it uses less digits than its factorization.

623305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 623305 is about 789.4966751038. The cubic root of 623305 is about 85.4214364446.

Subtracting from 623305 its sum of digits (19), we obtain a triangular number (623286 = T₁₁₁₆).

The spelling of 623305 in words is "six hundred twenty-three thousand, three hundred five".