238920001 has 4 divisors (see below), whose sum is σ = 238970032. Its totient is φ = 238869972.

The previous prime is 238919977. The next prime is 238920013. The reversal of 238920001 is 100029832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238920001 - 2⁷ = 238919873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238920061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16995 + ... + 27688.

It is an arithmetic number, because the mean of its divisors is an integer number (59742508).

Almost surely, 2^238920001 is an apocalyptic number.

It is an amenable number.

238920001 is a deficient number, since it is larger than the sum of its proper divisors (50031).

238920001 is an equidigital number, since it uses as much as digits as its factorization.

238920001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50030.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 238920001 is about 15457.0372646248. The cubic root of 238920001 is about 620.5129305439.

Adding to 238920001 its reverse (100029832), we get a palindrome (338949833).

The spelling of 238920001 in words is "two hundred thirty-eight million, nine hundred twenty thousand, one".