258226729 has 2 divisors, whose sum is σ = 258226730. Its totient is φ = 258226728.

The previous prime is 258226699. The next prime is 258226763. The reversal of 258226729 is 927622852.

258226729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241864704 + 16362025 = 15552^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 258226729 - 2⁹ = 258226217 is a prime.

It is not a weakly prime, because it can be changed into another prime (258226799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129113364 + 129113365.

It is an arithmetic number, because the mean of its divisors is an integer number (129113365).

Almost surely, 2^258226729 is an apocalyptic number.

It is an amenable number.

258226729 is a deficient number, since it is larger than the sum of its proper divisors (1).

258226729 is an equidigital number, since it uses as much as digits as its factorization.

258226729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 258226729 is about 16069.4346197992. The cubic root of 258226729 is about 636.7961044845.

The spelling of 258226729 in words is "two hundred fifty-eight million, two hundred twenty-six thousand, seven hundred twenty-nine".