238490897 has 4 divisors (see below), whose sum is σ = 241170660. Its totient is φ = 235811136.

The previous prime is 238490873. The next prime is 238490899. The reversal of 238490897 is 798094832.

It is a happy number.

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 12559936 + 225930961 = 3544^2 + 15031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238490897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238490899) 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, 1339748 + ... + 1339925.

It is an arithmetic number, because the mean of its divisors is an integer number (60292665).

Almost surely, 2^238490897 is an apocalyptic number.

It is an amenable number.

238490897 is a deficient number, since it is larger than the sum of its proper divisors (2679763).

238490897 is an equidigital number, since it uses as much as digits as its factorization.

238490897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679762.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 238490897 is about 15443.1504881614. The cubic root of 238490897 is about 620.1412243330.

The spelling of 238490897 in words is "two hundred thirty-eight million, four hundred ninety thousand, eight hundred ninety-seven".