623553 has 16 divisors (see below), whose sum is σ = 992256. Its totient is φ = 340560.

The previous prime is 623537. The next prime is 623563. The reversal of 623553 is 355326.

It is not a de Polignac number, because 623553 - 2⁴ = 623537 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (623563) 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, 163 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (62016).

2⁶²³⁵⁵³ is an apocalyptic number.

It is an amenable number.

623553 is a deficient number, since it is larger than the sum of its proper divisors (368703).

623553 is a wasteful number, since it uses less digits than its factorization.

623553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324.

The product of its digits is 2700, while the sum is 24.

The square root of 623553 is about 789.6537215767. The cubic root of 623553 is about 85.4327640757.

Adding to 623553 its reverse (355326), we get a palindrome (978879).

It can be divided in two parts, 623 and 553, that added together give a triangular number (1176 = T₄₈).

The spelling of 623553 in words is "six hundred twenty-three thousand, five hundred fifty-three".