238830478129 has 2 divisors, whose sum is σ = 238830478130. Its totient is φ = 238830478128.

The previous prime is 238830478109. The next prime is 238830478147. The reversal of 238830478129 is 921874038832.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159744102400 + 79086375729 = 399680^2 + 281223^2 .

It is a cyclic number.

It is not a de Polignac number, because 238830478129 - 2⁷ = 238830478001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238830478129.

It is not a weakly prime, because it can be changed into another prime (238830478109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119415239064 + 119415239065.

It is an arithmetic number, because the mean of its divisors is an integer number (119415239065).

Almost surely, 2^238830478129 is an apocalyptic number.

It is an amenable number.

238830478129 is a deficient number, since it is larger than the sum of its proper divisors (1).

238830478129 is an equidigital number, since it uses as much as digits as its factorization.

238830478129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 238830478129 in words is "two hundred thirty-eight billion, eight hundred thirty million, four hundred seventy-eight thousand, one hundred twenty-nine".