238872593921 has 4 divisors (see below), whose sum is σ = 257247408852. Its totient is φ = 220497778992.

The previous prime is 238872593903. The next prime is 238872593941. The reversal of 238872593921 is 129395278832.

238872593921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13147832896 + 225724761025 = 114664^2 + 475105^2 .

It is a cyclic number.

It is not a de Polignac number, because 238872593921 - 2²² = 238868399617 is a prime.

It is a super-2 number, since 2×238872593921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238872593941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9187407446 + ... + 9187407471.

It is an arithmetic number, because the mean of its divisors is an integer number (64311852213).

Almost surely, 2^238872593921 is an apocalyptic number.

It is an amenable number.

238872593921 is a deficient number, since it is larger than the sum of its proper divisors (18374814931).

238872593921 is a wasteful number, since it uses less digits than its factorization.

238872593921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18374814930.

The product of its digits is 13063680, while the sum is 59.

The spelling of 238872593921 in words is "two hundred thirty-eight billion, eight hundred seventy-two million, five hundred ninety-three thousand, nine hundred twenty-one".