238646789 has 2 divisors, whose sum is σ = 238646790. Its totient is φ = 238646788.

The previous prime is 238646747. The next prime is 238646791. The reversal of 238646789 is 987646832.

238646789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205492225 + 33154564 = 14335^2 + 5758^2 .

It is a cyclic number.

It is not a de Polignac number, because 238646789 - 2¹² = 238642693 is a prime.

It is a super-3 number, since 3×238646789³ (a number of 26 digits) contains 333 as substring.

Together with 238646791, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238646789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238646719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119323394 + 119323395.

It is an arithmetic number, because the mean of its divisors is an integer number (119323395).

Almost surely, 2^238646789 is an apocalyptic number.

It is an amenable number.

238646789 is a deficient number, since it is larger than the sum of its proper divisors (1).

238646789 is an equidigital number, since it uses as much as digits as its factorization.

238646789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The square root of 238646789 is about 15448.1969498061. The cubic root of 238646789 is about 620.2763154418.

The spelling of 238646789 in words is "two hundred thirty-eight million, six hundred forty-six thousand, seven hundred eighty-nine".