623539 has 8 divisors (see below), whose sum is σ = 717408. Its totient is φ = 530880.

The previous prime is 623537. The next prime is 623563. The reversal of 623539 is 935326.

623539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 623539 - 2¹ = 623537 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (623531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809 + ... + 2125.

It is an arithmetic number, because the mean of its divisors is an integer number (89676).

2⁶²³⁵³⁹ is an apocalyptic number.

623539 is a deficient number, since it is larger than the sum of its proper divisors (93869).

623539 is a wasteful number, since it uses less digits than its factorization.

623539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its digits is 4860, while the sum is 28.

The square root of 623539 is about 789.6448568819. The cubic root of 623539 is about 85.4321246926.

The spelling of 623539 in words is "six hundred twenty-three thousand, five hundred thirty-nine".