238736161 has 4 divisors (see below), whose sum is σ = 239867824. Its totient is φ = 237604500.

The previous prime is 238736111. The next prime is 238736191. The reversal of 238736161 is 161637832.

238736161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 238736161 - 2¹³ = 238727969 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 238736161.

It is not an unprimeable number, because it can be changed into a prime (238736111) 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, 565515 + ... + 565936.

It is an arithmetic number, because the mean of its divisors is an integer number (59966956).

Almost surely, 2^238736161 is an apocalyptic number.

It is an amenable number.

238736161 is a deficient number, since it is larger than the sum of its proper divisors (1131663).

238736161 is a wasteful number, since it uses less digits than its factorization.

238736161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131662.

The product of its digits is 36288, while the sum is 37.

The square root of 238736161 is about 15451.0893143493. The cubic root of 238736161 is about 620.3537358790.

The spelling of 238736161 in words is "two hundred thirty-eight million, seven hundred thirty-six thousand, one hundred sixty-one".