259428769 has 2 divisors, whose sum is σ = 259428770. Its totient is φ = 259428768.

The previous prime is 259428733. The next prime is 259428773. The reversal of 259428769 is 967824952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242985744 + 16443025 = 15588^2 + 4055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259428769 is a prime.

It is a super-2 number, since 2×259428769² = 134606572369710722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (259428779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129714384 + 129714385.

It is an arithmetic number, because the mean of its divisors is an integer number (129714385).

Almost surely, 2^259428769 is an apocalyptic number.

It is an amenable number.

259428769 is a deficient number, since it is larger than the sum of its proper divisors (1).

259428769 is an equidigital number, since it uses as much as digits as its factorization.

259428769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 259428769 is about 16106.7926354070. The cubic root of 259428769 is about 637.7826660871.

The spelling of 259428769 in words is "two hundred fifty-nine million, four hundred twenty-eight thousand, seven hundred sixty-nine".