258064549 has 2 divisors, whose sum is σ = 258064550. Its totient is φ = 258064548.

The previous prime is 258064501. The next prime is 258064561. The reversal of 258064549 is 945460852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181764324 + 76300225 = 13482^2 + 8735^2 .

It is a cyclic number.

It is not a de Polignac number, because 258064549 - 2⁷ = 258064421 is a prime.

It is a super-2 number, since 2×258064549² = 133194622901146802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258064249) 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, 129032274 + 129032275.

It is an arithmetic number, because the mean of its divisors is an integer number (129032275).

Almost surely, 2^258064549 is an apocalyptic number.

It is an amenable number.

258064549 is a deficient number, since it is larger than the sum of its proper divisors (1).

258064549 is an equidigital number, since it uses as much as digits as its factorization.

258064549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 258064549 is about 16064.3876011506. The cubic root of 258064549 is about 636.6627627232.

The spelling of 258064549 in words is "two hundred fifty-eight million, sixty-four thousand, five hundred forty-nine".