238642163 has 4 divisors (see below), whose sum is σ = 238787328. Its totient is φ = 238497000.

The previous prime is 238642139. The next prime is 238642177. The reversal of 238642163 is 361246832.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 238642163 - 2¹⁶ = 238576627 is a prime.

It is a super-2 number, since 2×238642163² = 113900163922637138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238642463) 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, 70088 + ... + 73413.

It is an arithmetic number, because the mean of its divisors is an integer number (59696832).

Almost surely, 2^238642163 is an apocalyptic number.

238642163 is a deficient number, since it is larger than the sum of its proper divisors (145165).

238642163 is a wasteful number, since it uses less digits than its factorization.

238642163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145164.

The product of its digits is 41472, while the sum is 35.

The square root of 238642163 is about 15448.0472228693. The cubic root of 238642163 is about 620.2723075427.

Adding to 238642163 its reverse (361246832), we get a palindrome (599888995).

The spelling of 238642163 in words is "two hundred thirty-eight million, six hundred forty-two thousand, one hundred sixty-three".