258237979 has 2 divisors, whose sum is σ = 258237980. Its totient is φ = 258237978.

The previous prime is 258237977. The next prime is 258238031. The reversal of 258237979 is 979732852.

It is an a-pointer prime, because the next prime (258238031) can be obtained adding 258237979 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258237979 - 2¹ = 258237977 is a prime.

Together with 258237977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (258237977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129118989 + 129118990.

It is an arithmetic number, because the mean of its divisors is an integer number (129118990).

Almost surely, 2^258237979 is an apocalyptic number.

258237979 is a deficient number, since it is larger than the sum of its proper divisors (1).

258237979 is an equidigital number, since it uses as much as digits as its factorization.

258237979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 258237979 is about 16069.7846594159. The cubic root of 258237979 is about 636.8053519808.

The spelling of 258237979 in words is "two hundred fifty-eight million, two hundred thirty-seven thousand, nine hundred seventy-nine".