258120077 has 2 divisors, whose sum is σ = 258120078. Its totient is φ = 258120076.

The previous prime is 258120011. The next prime is 258120101. The reversal of 258120077 is 770021852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258116356 + 3721 = 16066^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 258120077 - 2⁸ = 258119821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258120277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129060038 + 129060039.

It is an arithmetic number, because the mean of its divisors is an integer number (129060039).

Almost surely, 2^258120077 is an apocalyptic number.

It is an amenable number.

258120077 is a deficient number, since it is larger than the sum of its proper divisors (1).

258120077 is an equidigital number, since it uses as much as digits as its factorization.

258120077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 258120077 is about 16066.1158031430. The cubic root of 258120077 is about 636.7084232304.

The spelling of 258120077 in words is "two hundred fifty-eight million, one hundred twenty thousand, seventy-seven".