238891117 has 4 divisors (see below), whose sum is σ = 239001760. Its totient is φ = 238780476.

The previous prime is 238891111. The next prime is 238891127. The reversal of 238891117 is 711198832.

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 a de Polignac number, because none of the positive numbers 2^k-238891117 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 238891117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238891111) 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, 52017 + ... + 56422.

It is an arithmetic number, because the mean of its divisors is an integer number (59750440).

Almost surely, 2^238891117 is an apocalyptic number.

It is an amenable number.

238891117 is a deficient number, since it is larger than the sum of its proper divisors (110643).

238891117 is a wasteful number, since it uses less digits than its factorization.

238891117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110642.

The product of its digits is 24192, while the sum is 40.

The square root of 238891117 is about 15456.1029046781. The cubic root of 238891117 is about 620.4879241014.

The spelling of 238891117 in words is "two hundred thirty-eight million, eight hundred ninety-one thousand, one hundred seventeen".