238362721 has 3 divisors (see below), whose sum is σ = 238378161. Its totient is φ = 238347282.

The previous prime is 238362713. The next prime is 238362743. The reversal of 238362721 is 127263832.

The square root of 238362721 is 15439.

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 is not a de Polignac number, because 238362721 - 2³ = 238362713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238362781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7720 + ... + 23158.

It is an arithmetic number, because the mean of its divisors is an integer number (79459387).

Almost surely, 2^238362721 is an apocalyptic number.

238362721 is the 15439-th square number.

238362721 is the 7720-th centered octagonal number.

It is an amenable number.

238362721 is a deficient number, since it is larger than the sum of its proper divisors (15440).

238362721 is an frugal number, since it uses more digits than its factorization.

238362721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30878 (or 15439 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The cubic root of 238362721 is about 620.0301069320.

The spelling of 238362721 in words is "two hundred thirty-eight million, three hundred sixty-two thousand, seven hundred twenty-one".