238865789 has 2 divisors, whose sum is σ = 238865790. Its totient is φ = 238865788.

The previous prime is 238865773. The next prime is 238865831. The reversal of 238865789 is 987568832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208802500 + 30063289 = 14450^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 238865789 - 2⁴ = 238865773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238865729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119432894 + 119432895.

It is an arithmetic number, because the mean of its divisors is an integer number (119432895).

Almost surely, 2^238865789 is an apocalyptic number.

It is an amenable number.

238865789 is a deficient number, since it is larger than the sum of its proper divisors (1).

238865789 is an equidigital number, since it uses as much as digits as its factorization.

238865789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 56.

The square root of 238865789 is about 15455.2835302365. The cubic root of 238865789 is about 620.4659946219.

The spelling of 238865789 in words is "two hundred thirty-eight million, eight hundred sixty-five thousand, seven hundred eighty-nine".