623489 has 4 divisors (see below), whose sum is σ = 629424. Its totient is φ = 617556.

The previous prime is 623477. The next prime is 623521. The reversal of 623489 is 984326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2807 + ... + 3020.

It is an arithmetic number, because the mean of its divisors is an integer number (157356).

2⁶²³⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

623489 is a deficient number, since it is larger than the sum of its proper divisors (5935).

623489 is a wasteful number, since it uses less digits than its factorization.

623489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934.

The product of its digits is 10368, while the sum is 32.

The square root of 623489 is about 789.6131964449. The cubic root of 623489 is about 85.4298411036.

The spelling of 623489 in words is "six hundred twenty-three thousand, four hundred eighty-nine".