238301161921 has 3 divisors (see below), whose sum is σ = 238301650083. Its totient is φ = 238300673760.

The previous prime is 238301161859. The next prime is 238301161927. The reversal of 238301161921 is 129161103832.

The square root of 238301161921 is 488161.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 94963201921 + 143337960000 = 308161^2 + 378600^2 .

It is not a de Polignac number, because 238301161921 - 2¹³ = 238301153729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238301161927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 244081 + ... + 732241.

It is an arithmetic number, because the mean of its divisors is an integer number (79433883361).

Almost surely, 2^238301161921 is an apocalyptic number.

238301161921 is the 488161-st square number.

238301161921 is the 244081-st centered octagonal number.

It is an amenable number.

238301161921 is a deficient number, since it is larger than the sum of its proper divisors (488162).

238301161921 is an frugal number, since it uses more digits than its factorization.

238301161921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976322 (or 488161 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 238301161921 in words is "two hundred thirty-eight billion, three hundred one million, one hundred sixty-one thousand, nine hundred twenty-one".