163405401 has 8 divisors (see below), whose sum is σ = 225386880. Its totient is φ = 105180432.

The previous prime is 163405399. The next prime is 163405447. The reversal of 163405401 is 104504361.

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

It is not a de Polignac number, because 163405401 - 2¹ = 163405399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163405001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939025 + ... + 939198.

It is an arithmetic number, because the mean of its divisors is an integer number (28173360).

Almost surely, 2^163405401 is an apocalyptic number.

It is an amenable number.

163405401 is a deficient number, since it is larger than the sum of its proper divisors (61981479).

163405401 is a wasteful number, since it uses less digits than its factorization.

163405401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878255.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 163405401 is about 12783.0122037022. The cubic root of 163405401 is about 546.7080503984.

Adding to 163405401 its reverse (104504361), we get a palindrome (267909762).

The spelling of 163405401 in words is "one hundred sixty-three million, four hundred five thousand, four hundred one".