238817779139 has 2 divisors, whose sum is σ = 238817779140. Its totient is φ = 238817779138.

The previous prime is 238817779117. The next prime is 238817779223. The reversal of 238817779139 is 931977718832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238817779139 - 2³² = 234522811843 is a prime.

It is not a weakly prime, because it can be changed into another prime (238817775139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119408889569 + 119408889570.

It is an arithmetic number, because the mean of its divisors is an integer number (119408889570).

Almost surely, 2^238817779139 is an apocalyptic number.

238817779139 is a deficient number, since it is larger than the sum of its proper divisors (1).

238817779139 is an equidigital number, since it uses as much as digits as its factorization.

238817779139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32006016, while the sum is 65.

The spelling of 238817779139 in words is "two hundred thirty-eight billion, eight hundred seventeen million, seven hundred seventy-nine thousand, one hundred thirty-nine".