163121361 has 8 divisors (see below), whose sum is σ = 234225600. Its totient is φ = 100382352.

The previous prime is 163121351. The next prime is 163121369.

163121361 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 163121361 - 2¹⁰ = 163120337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163121369) 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, 2091261 + ... + 2091338.

It is an arithmetic number, because the mean of its divisors is an integer number (29278200).

Almost surely, 2^163121361 is an apocalyptic number.

It is an amenable number.

163121361 is a deficient number, since it is larger than the sum of its proper divisors (71104239).

163121361 is a wasteful number, since it uses less digits than its factorization.

163121361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182615.

The product of its digits is 648, while the sum is 24.

The square root of 163121361 is about 12771.8973140250. The cubic root of 163121361 is about 546.3910942947.

The spelling of 163121361 in words is "one hundred sixty-three million, one hundred twenty-one thousand, three hundred sixty-one".