258918223 has 2 divisors, whose sum is σ = 258918224. Its totient is φ = 258918222.

The previous prime is 258918203. The next prime is 258918227. The reversal of 258918223 is 322819852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258918223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258918227) 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, 129459111 + 129459112.

It is an arithmetic number, because the mean of its divisors is an integer number (129459112).

Almost surely, 2^258918223 is an apocalyptic number.

258918223 is a deficient number, since it is larger than the sum of its proper divisors (1).

258918223 is an equidigital number, since it uses as much as digits as its factorization.

258918223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 258918223 is about 16090.9360510817. The cubic root of 258918223 is about 637.3640139525.

The spelling of 258918223 in words is "two hundred fifty-eight million, nine hundred eighteen thousand, two hundred twenty-three".