163788643 has 8 divisors (see below), whose sum is σ = 166489856. Its totient is φ = 161109000.

The previous prime is 163788637. The next prime is 163788649. The reversal of 163788643 is 346887361.

It is an interprime number because it is at equal distance from previous prime (163788637) and next prime (163788649).

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 163788643 - 2¹³ = 163780451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163788593 and 163788602.

It is not an unprimeable number, because it can be changed into a prime (163788649) 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, 10288 + ... + 20818.

It is an arithmetic number, because the mean of its divisors is an integer number (20811232).

Almost surely, 2^163788643 is an apocalyptic number.

163788643 is a deficient number, since it is larger than the sum of its proper divisors (2701213).

163788643 is a wasteful number, since it uses less digits than its factorization.

163788643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10785.

The product of its digits is 580608, while the sum is 46.

The square root of 163788643 is about 12797.9937099531. The cubic root of 163788643 is about 547.1351229807.

The spelling of 163788643 in words is "one hundred sixty-three million, seven hundred eighty-eight thousand, six hundred forty-three".