258280397 has 2 divisors, whose sum is σ = 258280398. Its totient is φ = 258280396.

The previous prime is 258280367. The next prime is 258280411. The reversal of 258280397 is 793082852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231922441 + 26357956 = 15229^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 258280397 - 2⁶ = 258280333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258280327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129140198 + 129140199.

It is an arithmetic number, because the mean of its divisors is an integer number (129140199).

Almost surely, 2^258280397 is an apocalyptic number.

It is an amenable number.

258280397 is a deficient number, since it is larger than the sum of its proper divisors (1).

258280397 is an equidigital number, since it uses as much as digits as its factorization.

258280397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 258280397 is about 16071.1044113340. The cubic root of 258280397 is about 636.8402171475.

The spelling of 258280397 in words is "two hundred fifty-eight million, two hundred eighty thousand, three hundred ninety-seven".