238512979 has 2 divisors, whose sum is σ = 238512980. Its totient is φ = 238512978.

The previous prime is 238512917. The next prime is 238512983. The reversal of 238512979 is 979215832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238512979 - 2⁹ = 238512467 is a prime.

It is not a weakly prime, because it can be changed into another prime (238516979) 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, 119256489 + 119256490.

It is an arithmetic number, because the mean of its divisors is an integer number (119256490).

Almost surely, 2^238512979 is an apocalyptic number.

238512979 is a deficient number, since it is larger than the sum of its proper divisors (1).

238512979 is an equidigital number, since it uses as much as digits as its factorization.

238512979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 238512979 is about 15443.8654164040. The cubic root of 238512979 is about 620.1603634784.

The spelling of 238512979 in words is "two hundred thirty-eight million, five hundred twelve thousand, nine hundred seventy-nine".