623459 has 4 divisors (see below), whose sum is σ = 629616. Its totient is φ = 617304.

The previous prime is 623437. The next prime is 623477. The reversal of 623459 is 954326.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954326 = 2 ⋅477163.

It is a cyclic number.

It is not a de Polignac number, because 623459 - 2¹² = 619363 is a prime.

It is a super-2 number, since 2×623459² = 777402249362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2924 + ... + 3129.

It is an arithmetic number, because the mean of its divisors is an integer number (157404).

2⁶²³⁴⁵⁹ is an apocalyptic number.

623459 is a deficient number, since it is larger than the sum of its proper divisors (6157).

623459 is a wasteful number, since it uses less digits than its factorization.

623459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156.

The product of its digits is 6480, while the sum is 29.

The square root of 623459 is about 789.5941995734. The cubic root of 623459 is about 85.4284708916.

The spelling of 623459 in words is "six hundred twenty-three thousand, four hundred fifty-nine".