1623606609 has 8 divisors (see below), whose sum is σ = 2165074272. Its totient is φ = 1082271680.

The previous prime is 1623606571. The next prime is 1623606623. The reversal of 1623606609 is 9066063261.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1623606609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1623602609) 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, 142 + ... + 56984.

It is an arithmetic number, because the mean of its divisors is an integer number (270634284).

Almost surely, 2^1623606609 is an apocalyptic number.

It is an amenable number.

1623606609 is a deficient number, since it is larger than the sum of its proper divisors (541467663).

1623606609 is an equidigital number, since it uses as much as digits as its factorization.

1623606609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66367.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 1623606609 is about 40294.0021467215. The cubic root of 1623606609 is about 1175.3312140664.

The spelling of 1623606609 in words is "one billion, six hundred twenty-three million, six hundred six thousand, six hundred nine".