238047138487 has 4 divisors (see below), whose sum is σ = 238048941096. Its totient is φ = 238045335880.

The previous prime is 238047138457. The next prime is 238047138491. The reversal of 238047138487 is 784831740832.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238047138487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238047138457) 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 3 ways as a sum of consecutive naturals, for example, 686089 + ... + 973042.

It is an arithmetic number, because the mean of its divisors is an integer number (59512235274).

Almost surely, 2^238047138487 is an apocalyptic number.

238047138487 is a deficient number, since it is larger than the sum of its proper divisors (1802609).

238047138487 is a wasteful number, since it uses less digits than its factorization.

238047138487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802608.

The product of its (nonzero) digits is 7225344, while the sum is 55.

The spelling of 238047138487 in words is "two hundred thirty-eight billion, forty-seven million, one hundred thirty-eight thousand, four hundred eighty-seven".