238483309 has 2 divisors, whose sum is σ = 238483310. Its totient is φ = 238483308.

The previous prime is 238483303. The next prime is 238483313. The reversal of 238483309 is 903384832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 77827684 = 12675^2 + 8822^2 .

It is a cyclic number.

It is not a de Polignac number, because 238483309 - 2⁵ = 238483277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238483303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119241654 + 119241655.

It is an arithmetic number, because the mean of its divisors is an integer number (119241655).

Almost surely, 2^238483309 is an apocalyptic number.

It is an amenable number.

238483309 is a deficient number, since it is larger than the sum of its proper divisors (1).

238483309 is an equidigital number, since it uses as much as digits as its factorization.

238483309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 238483309 is about 15442.9048109480. The cubic root of 238483309 is about 620.1346473083.

The spelling of 238483309 in words is "two hundred thirty-eight million, four hundred eighty-three thousand, three hundred nine".