258246409 has 2 divisors, whose sum is σ = 258246410. Its totient is φ = 258246408.

The previous prime is 258246403. The next prime is 258246451. The reversal of 258246409 is 904642852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257698809 + 547600 = 16053^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 258246409 - 2⁵ = 258246377 is a prime.

It is a super-2 number, since 2×258246409² = 133382415522790562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258246403) 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, 129123204 + 129123205.

It is an arithmetic number, because the mean of its divisors is an integer number (129123205).

Almost surely, 2^258246409 is an apocalyptic number.

It is an amenable number.

258246409 is a deficient number, since it is larger than the sum of its proper divisors (1).

258246409 is an equidigital number, since it uses as much as digits as its factorization.

258246409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 258246409 is about 16070.0469507715. The cubic root of 258246409 is about 636.8122812620.

The spelling of 258246409 in words is "two hundred fifty-eight million, two hundred forty-six thousand, four hundred nine".