623217 has 16 divisors (see below), whose sum is σ = 967680. Its totient is φ = 349392.

The previous prime is 623209. The next prime is 623221. The reversal of 623217 is 712326.

It is a happy number.

It is not a de Polignac number, because 623217 - 2³ = 623209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

623217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 623193 and 623202.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623217.

It is not an unprimeable number, because it can be changed into a prime (623017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988 + ... + 1490.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶²³²¹⁷ is an apocalyptic number.

It is an amenable number.

623217 is a deficient number, since it is larger than the sum of its proper divisors (344463).

623217 is a wasteful number, since it uses less digits than its factorization.

623217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its digits is 504, while the sum is 21.

The square root of 623217 is about 789.4409414263. The cubic root of 623217 is about 85.4174162404.

The spelling of 623217 in words is "six hundred twenty-three thousand, two hundred seventeen".