623709643 has 8 divisors (see below), whose sum is σ = 632139696. Its totient is φ = 615324000.

The previous prime is 623709631. The next prime is 623709659. The reversal of 623709643 is 346907326.

623709643 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 a cyclic number.

It is not a de Polignac number, because 623709643 - 2⁹ = 623709131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623709596 and 623709605.

It is not an unprimeable number, because it can be changed into a prime (623709673) 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, 17673 + ... + 39493.

It is an arithmetic number, because the mean of its divisors is an integer number (79017462).

Almost surely, 2^623709643 is an apocalyptic number.

623709643 is a deficient number, since it is larger than the sum of its proper divisors (8430053).

623709643 is a wasteful number, since it uses less digits than its factorization.

623709643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22205.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 623709643 is about 24974.1795260625. The cubic root of 623709643 is about 854.3991734304.

The spelling of 623709643 in words is "six hundred twenty-three million, seven hundred nine thousand, six hundred forty-three".