258317243 has 2 divisors, whose sum is σ = 258317244. Its totient is φ = 258317242.

The previous prime is 258317237. The next prime is 258317273. The reversal of 258317243 is 342713852.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258317243 is a prime.

It is a super-2 number, since 2×258317243² = 133455596062242098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258317233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129158621 + 129158622.

It is an arithmetic number, because the mean of its divisors is an integer number (129158622).

Almost surely, 2^258317243 is an apocalyptic number.

258317243 is a deficient number, since it is larger than the sum of its proper divisors (1).

258317243 is an equidigital number, since it uses as much as digits as its factorization.

258317243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 258317243 is about 16072.2507135746. The cubic root of 258317243 is about 636.8704993514.

The spelling of 258317243 in words is "two hundred fifty-eight million, three hundred seventeen thousand, two hundred forty-three".