623501 has 4 divisors (see below), whose sum is σ = 625404. Its totient is φ = 621600.

The previous prime is 623477. The next prime is 623521. The reversal of 623501 is 105326.

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 90601 + 532900 = 301^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 623501 - 2⁶ = 623437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623521) 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, 320 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (156351).

2⁶²³⁵⁰¹ is an apocalyptic number.

It is an amenable number.

623501 is a deficient number, since it is larger than the sum of its proper divisors (1903).

623501 is a wasteful number, since it uses less digits than its factorization.

623501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 623501 is about 789.6207950656. The cubic root of 623501 is about 85.4303891761.

Adding to 623501 its reverse (105326), we get a palindrome (728827).

The spelling of 623501 in words is "six hundred twenty-three thousand, five hundred one".