238690313 has 2 divisors, whose sum is σ = 238690314. Its totient is φ = 238690312.

The previous prime is 238690289. The next prime is 238690327. The reversal of 238690313 is 313096832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159693769 + 78996544 = 12637^2 + 8888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238690313 is a prime.

It is not a weakly prime, because it can be changed into another prime (238690373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119345156 + 119345157.

It is an arithmetic number, because the mean of its divisors is an integer number (119345157).

Almost surely, 2^238690313 is an apocalyptic number.

It is an amenable number.

238690313 is a deficient number, since it is larger than the sum of its proper divisors (1).

238690313 is an equidigital number, since it uses as much as digits as its factorization.

238690313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 238690313 is about 15449.6055936713. The cubic root of 238690313 is about 620.3140214667.

The spelling of 238690313 in words is "two hundred thirty-eight million, six hundred ninety thousand, three hundred thirteen".