163328401 has 8 divisors (see below), whose sum is σ = 173071080. Its totient is φ = 153600768.

The previous prime is 163328393. The next prime is 163328411. The reversal of 163328401 is 104823361.

It is a Cunningham number, because it is equal to 12780²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 163328400 = 1^2 + 12780^2 .

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 163328401 - 2³ = 163328393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163328401.

It is not an unprimeable number, because it can be changed into a prime (163328411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24895 + ... + 30763.

It is an arithmetic number, because the mean of its divisors is an integer number (21633885).

Almost surely, 2^163328401 is an apocalyptic number.

It is an amenable number.

163328401 is a deficient number, since it is larger than the sum of its proper divisors (9742679).

163328401 is a wasteful number, since it uses less digits than its factorization.

163328401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 163328401 is about 12780.0000391236. Note that the first 4 decimals coincide. The cubic root of 163328401 is about 546.6221635313.

The spelling of 163328401 in words is "one hundred sixty-three million, three hundred twenty-eight thousand, four hundred one".