238164709 has 2 divisors, whose sum is σ = 238164710. Its totient is φ = 238164708.

The previous prime is 238164653. The next prime is 238164739. The reversal of 238164709 is 907461832.

238164709 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., 201015684 + 37149025 = 14178^2 + 6095^2 .

It is a cyclic number.

It is not a de Polignac number, because 238164709 - 2⁷ = 238164581 is a prime.

It is a super-2 number, since 2×238164709² = 113444857226109362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238164739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119082354 + 119082355.

It is an arithmetic number, because the mean of its divisors is an integer number (119082355).

Almost surely, 2^238164709 is an apocalyptic number.

It is an amenable number.

238164709 is a deficient number, since it is larger than the sum of its proper divisors (1).

238164709 is an equidigital number, since it uses as much as digits as its factorization.

238164709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 238164709 is about 15432.5859466261. The cubic root of 238164709 is about 619.8583694873.

The spelling of 238164709 in words is "two hundred thirty-eight million, one hundred sixty-four thousand, seven hundred nine".