623555 has 8 divisors (see below), whose sum is σ = 752544. Its totient is φ = 496000.

The previous prime is 623537. The next prime is 623563. The reversal of 623555 is 555326.

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

It is not a de Polignac number, because 623555 - 2⁸ = 623299 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355 + ... + 1755.

It is an arithmetic number, because the mean of its divisors is an integer number (94068).

2⁶²³⁵⁵⁵ is an apocalyptic number.

623555 is a deficient number, since it is larger than the sum of its proper divisors (128989).

623555 is a wasteful number, since it uses less digits than its factorization.

623555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717.

The product of its digits is 4500, while the sum is 26.

The square root of 623555 is about 789.6549879536. The cubic root of 623555 is about 85.4328554153.

The spelling of 623555 in words is "six hundred twenty-three thousand, five hundred fifty-five".