259428779 has 2 divisors, whose sum is σ = 259428780. Its totient is φ = 259428778.

The previous prime is 259428773. The next prime is 259428797. The reversal of 259428779 is 977824952.

Together with next prime (259428797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259428779 - 2²⁰ = 258380203 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 259428779.

It is not a weakly prime, because it can be changed into another prime (259428773) 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, 129714389 + 129714390.

It is an arithmetic number, because the mean of its divisors is an integer number (129714390).

Almost surely, 2^259428779 is an apocalyptic number.

259428779 is a deficient number, since it is larger than the sum of its proper divisors (1).

259428779 is an equidigital number, since it uses as much as digits as its factorization.

259428779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 259428779 is about 16106.7929458350. The cubic root of 259428779 is about 637.7826742819.

The spelling of 259428779 in words is "two hundred fifty-nine million, four hundred twenty-eight thousand, seven hundred seventy-nine".