623564 has 6 divisors (see below), whose sum is σ = 1091244. Its totient is φ = 311780.

The previous prime is 623563. The next prime is 623591. The reversal of 623564 is 465326.

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 as a sum of consecutive naturals, namely, 77942 + ... + 77949.

It is an arithmetic number, because the mean of its divisors is an integer number (181874).

2⁶²³⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

623564 is a deficient number, since it is larger than the sum of its proper divisors (467680).

623564 is a wasteful number, since it uses less digits than its factorization.

623564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155895 (or 155893 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 623564 is about 789.6606866243. The cubic root of 623564 is about 85.4332664413.

The spelling of 623564 in words is "six hundred twenty-three thousand, five hundred sixty-four".