623509643 has 8 divisors (see below), whose sum is σ = 660509520. Its totient is φ = 586928160.

The previous prime is 623509637. The next prime is 623509669. The reversal of 623509643 is 346905326.

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 623509643 - 2¹⁴ = 623493259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623509597 and 623509606.

It is not an unprimeable number, because it can be changed into a prime (623509613) 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, 101528 + ... + 107493.

It is an arithmetic number, because the mean of its divisors is an integer number (82563690).

Almost surely, 2^623509643 is an apocalyptic number.

623509643 is a deficient number, since it is larger than the sum of its proper divisors (36999877).

623509643 is a wasteful number, since it uses less digits than its factorization.

623509643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209197.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 623509643 is about 24970.1750694704. The cubic root of 623509643 is about 854.3078392096.

The spelling of 623509643 in words is "six hundred twenty-three million, five hundred nine thousand, six hundred forty-three".