238783813 has 2 divisors, whose sum is σ = 238783814. Its totient is φ = 238783812.

The previous prime is 238783801. The next prime is 238783817. The reversal of 238783813 is 318387832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219573124 + 19210689 = 14818^2 + 4383^2 .

It is a cyclic number.

It is not a de Polignac number, because 238783813 - 2⁹ = 238783301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238783813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238783817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119391906 + 119391907.

It is an arithmetic number, because the mean of its divisors is an integer number (119391907).

Almost surely, 2^238783813 is an apocalyptic number.

It is an amenable number.

238783813 is a deficient number, since it is larger than the sum of its proper divisors (1).

238783813 is an equidigital number, since it uses as much as digits as its factorization.

238783813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 238783813 is about 15452.6312646099. The cubic root of 238783813 is about 620.3950075622.

The spelling of 238783813 in words is "two hundred thirty-eight million, seven hundred eighty-three thousand, eight hundred thirteen".