259428991 has 2 divisors, whose sum is σ = 259428992. Its totient is φ = 259428990.

The previous prime is 259428979. The next prime is 259429013. The reversal of 259428991 is 199824952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259428991 - 2¹⁹ = 258904703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259428971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129714495 + 129714496.

It is an arithmetic number, because the mean of its divisors is an integer number (129714496).

Almost surely, 2^259428991 is an apocalyptic number.

259428991 is a deficient number, since it is larger than the sum of its proper divisors (1).

259428991 is an equidigital number, since it uses as much as digits as its factorization.

259428991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 259428991 is about 16106.7995269079. The cubic root of 259428991 is about 637.7828480095.

The spelling of 259428991 in words is "two hundred fifty-nine million, four hundred twenty-eight thousand, nine hundred ninety-one".