623505 has 16 divisors (see below), whose sum is σ = 1007424. Its totient is φ = 329280.

The previous prime is 623477. The next prime is 623521. The reversal of 623505 is 505326.

623505 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 623505 - 2¹⁰ = 622481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2850 + ... + 3060.

It is an arithmetic number, because the mean of its divisors is an integer number (62964).

2⁶²³⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

623505 is a deficient number, since it is larger than the sum of its proper divisors (383919).

623505 is a wasteful number, since it uses less digits than its factorization.

623505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 623505 is about 789.6233279229. The cubic root of 623505 is about 85.4305718654.

It can be divided in two parts, 623 and 505, that added together give a triangular number (1128 = T₄₇).

The spelling of 623505 in words is "six hundred twenty-three thousand, five hundred five".