623443613 has 8 divisors (see below), whose sum is σ = 671713056. Its totient is φ = 575218800.

The previous prime is 623443559. The next prime is 623443631. The reversal of 623443613 is 316344326.

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

It is not a de Polignac number, because 623443613 - 2⁶ = 623443549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 623443613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623443693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21398 + ... + 41288.

It is an arithmetic number, because the mean of its divisors is an integer number (83964132).

Almost surely, 2^623443613 is an apocalyptic number.

It is an amenable number.

623443613 is a deficient number, since it is larger than the sum of its proper divisors (48269443).

623443613 is a wasteful number, since it uses less digits than its factorization.

623443613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315.

The product of its digits is 31104, while the sum is 32.

The square root of 623443613 is about 24968.8528571098. The cubic root of 623443613 is about 854.2776809281.

Adding to 623443613 its reverse (316344326), we get a palindrome (939787939).

The spelling of 623443613 in words is "six hundred twenty-three million, four hundred forty-three thousand, six hundred thirteen".