623664609 has 8 divisors (see below), whose sum is σ = 843964320. Its totient is φ = 409570656.

The previous prime is 623664599. The next prime is 623664649. The reversal of 623664609 is 906466326.

623664609 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 623664609 - 2²⁸ = 355229153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623664649) 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, 1551204 + ... + 1551605.

It is an arithmetic number, because the mean of its divisors is an integer number (105495540).

Almost surely, 2^623664609 is an apocalyptic number.

It is an amenable number.

623664609 is a deficient number, since it is larger than the sum of its proper divisors (220299711).

623664609 is a wasteful number, since it uses less digits than its factorization.

623664609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102879.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 623664609 is about 24973.2778985859. The cubic root of 623664609 is about 854.3786094074.

The spelling of 623664609 in words is "six hundred twenty-three million, six hundred sixty-four thousand, six hundred nine".