258379817 has 2 divisors, whose sum is σ = 258379818. Its totient is φ = 258379816.

The previous prime is 258379757. The next prime is 258379829. The reversal of 258379817 is 718973852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169624576 + 88755241 = 13024^2 + 9421^2 .

It is a cyclic number.

It is not a de Polignac number, because 258379817 - 2¹⁰ = 258378793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258379867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129189908 + 129189909.

It is an arithmetic number, because the mean of its divisors is an integer number (129189909).

Almost surely, 2^258379817 is an apocalyptic number.

It is an amenable number.

258379817 is a deficient number, since it is larger than the sum of its proper divisors (1).

258379817 is an equidigital number, since it uses as much as digits as its factorization.

258379817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 50.

The square root of 258379817 is about 16074.1972427863. The cubic root of 258379817 is about 636.9219197376.

The spelling of 258379817 in words is "two hundred fifty-eight million, three hundred seventy-nine thousand, eight hundred seventeen".