258878377 has 2 divisors, whose sum is σ = 258878378. Its totient is φ = 258878376.

The previous prime is 258878369. The next prime is 258878423. The reversal of 258878377 is 773878852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258052096 + 826281 = 16064^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 258878377 - 2³ = 258878369 is a prime.

It is not a weakly prime, because it can be changed into another prime (258878357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129439188 + 129439189.

It is an arithmetic number, because the mean of its divisors is an integer number (129439189).

Almost surely, 2^258878377 is an apocalyptic number.

It is an amenable number.

258878377 is a deficient number, since it is larger than the sum of its proper divisors (1).

258878377 is an equidigital number, since it uses as much as digits as its factorization.

258878377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5268480, while the sum is 55.

The square root of 258878377 is about 16089.6978529741. The cubic root of 258878377 is about 637.3313167440.

The spelling of 258878377 in words is "two hundred fifty-eight million, eight hundred seventy-eight thousand, three hundred seventy-seven".