258855979 has 2 divisors, whose sum is σ = 258855980. Its totient is φ = 258855978.

The previous prime is 258855973. The next prime is 258856009. The reversal of 258855979 is 979558852.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258855979 is a prime.

It is not a weakly prime, because it can be changed into another prime (258855973) 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, 129427989 + 129427990.

It is an arithmetic number, because the mean of its divisors is an integer number (129427990).

Almost surely, 2^258855979 is an apocalyptic number.

258855979 is a deficient number, since it is larger than the sum of its proper divisors (1).

258855979 is an equidigital number, since it uses as much as digits as its factorization.

258855979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072000, while the sum is 58.

The square root of 258855979 is about 16089.0018024736. The cubic root of 258855979 is about 637.3129357077.

Subtracting from 258855979 its sum of digits (58), we obtain a square (258855921 = 16089²).

The spelling of 258855979 in words is "two hundred fifty-eight million, eight hundred fifty-five thousand, nine hundred seventy-nine".