623995 has 4 divisors (see below), whose sum is σ = 748800. Its totient is φ = 499192.

The previous prime is 623989. The next prime is 624007. The reversal of 623995 is 599326.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 623995 - 2⁵ = 623963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623995.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62395 + ... + 62404.

It is an arithmetic number, because the mean of its divisors is an integer number (187200).

2⁶²³⁹⁹⁵ is an apocalyptic number.

623995 is a deficient number, since it is larger than the sum of its proper divisors (124805).

623995 is a wasteful number, since it uses less digits than its factorization.

623995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124804.

The product of its digits is 14580, while the sum is 34.

The square root of 623995 is about 789.9335415084. The cubic root of 623995 is about 85.4529453930.

The spelling of 623995 in words is "six hundred twenty-three thousand, nine hundred ninety-five".