238904643963 has 4 divisors (see below), whose sum is σ = 318539525288. Its totient is φ = 159269762640.

The previous prime is 238904643961. The next prime is 238904643997. The reversal of 238904643963 is 369346409832.

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

It is not a de Polignac number, because 238904643963 - 2¹ = 238904643961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238904643961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39817440658 + ... + 39817440663.

It is an arithmetic number, because the mean of its divisors is an integer number (79634881322).

Almost surely, 2^238904643963 is an apocalyptic number.

238904643963 is a deficient number, since it is larger than the sum of its proper divisors (79634881325).

238904643963 is an equidigital number, since it uses as much as digits as its factorization.

238904643963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79634881324.

The product of its (nonzero) digits is 20155392, while the sum is 57.

The spelling of 238904643963 in words is "two hundred thirty-eight billion, nine hundred four million, six hundred forty-three thousand, nine hundred sixty-three".