238139999 has 8 divisors (see below), whose sum is σ = 249080832. Its totient is φ = 227248120.

The previous prime is 238139987. The next prime is 238140127. The reversal of 238139999 is 999931832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238139999 - 2⁴ = 238139983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 238139999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238139299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2099 + ... + 21924.

It is an arithmetic number, because the mean of its divisors is an integer number (31135104).

Almost surely, 2^238139999 is an apocalyptic number.

238139999 is a deficient number, since it is larger than the sum of its proper divisors (10940833).

238139999 is a wasteful number, since it uses less digits than its factorization.

238139999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24477.

The product of its digits is 944784, while the sum is 53.

The square root of 238139999 is about 15431.7853471334. The cubic root of 238139999 is about 619.8369316203.

The spelling of 238139999 in words is "two hundred thirty-eight million, one hundred thirty-nine thousand, nine hundred ninety-nine".