238399989137 has 4 divisors (see below), whose sum is σ = 248765206080. Its totient is φ = 228034772196.

The previous prime is 238399989133. The next prime is 238399989151. The reversal of 238399989137 is 731989993832.

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 238399989137 - 2² = 238399989133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238399989133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5182608437 + ... + 5182608482.

It is an arithmetic number, because the mean of its divisors is an integer number (62191301520).

Almost surely, 2^238399989137 is an apocalyptic number.

It is an amenable number.

238399989137 is a deficient number, since it is larger than the sum of its proper divisors (10365216943).

238399989137 is a wasteful number, since it uses less digits than its factorization.

238399989137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365216942.

The product of its digits is 158723712, while the sum is 71.

The spelling of 238399989137 in words is "two hundred thirty-eight billion, three hundred ninety-nine million, nine hundred eighty-nine thousand, one hundred thirty-seven".