163239401 has 4 divisors (see below), whose sum is σ = 175796292. Its totient is φ = 150682512.

The previous prime is 163239379. The next prime is 163239499. The reversal of 163239401 is 104932361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104932361 = 389 ⋅269749.

It can be written as a sum of positive squares in 2 ways, for example, as 25200400 + 138039001 = 5020^2 + 11749^2 .

It is a cyclic number.

It is not a de Polignac number, because 163239401 - 2²⁶ = 96130537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163233401) 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 3 ways as a sum of consecutive naturals, for example, 6278426 + ... + 6278451.

It is an arithmetic number, because the mean of its divisors is an integer number (43949073).

Almost surely, 2^163239401 is an apocalyptic number.

It is an amenable number.

163239401 is a deficient number, since it is larger than the sum of its proper divisors (12556891).

163239401 is a wasteful number, since it uses less digits than its factorization.

163239401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12556890.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 163239401 is about 12776.5175615267. The cubic root of 163239401 is about 546.5228580594.

The spelling of 163239401 in words is "one hundred sixty-three million, two hundred thirty-nine thousand, four hundred one".