238677779 has 2 divisors, whose sum is σ = 238677780. Its totient is φ = 238677778.

The previous prime is 238677767. The next prime is 238677793. The reversal of 238677779 is 977776832.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238677779 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238677799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119338889 + 119338890.

It is an arithmetic number, because the mean of its divisors is an integer number (119338890).

Almost surely, 2^238677779 is an apocalyptic number.

238677779 is a deficient number, since it is larger than the sum of its proper divisors (1).

238677779 is an equidigital number, since it uses as much as digits as its factorization.

238677779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6223392, while the sum is 56.

The square root of 238677779 is about 15449.1999469228. The cubic root of 238677779 is about 620.3031633916.

The spelling of 238677779 in words is "two hundred thirty-eight million, six hundred seventy-seven thousand, seven hundred seventy-nine".