259428691 has 2 divisors, whose sum is σ = 259428692. Its totient is φ = 259428690.

The previous prime is 259428683. The next prime is 259428733. The reversal of 259428691 is 196824952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259428691 - 2³ = 259428683 is a prime.

It is not a weakly prime, because it can be changed into another prime (259428991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129714345 + 129714346.

It is an arithmetic number, because the mean of its divisors is an integer number (129714346).

Almost surely, 2^259428691 is an apocalyptic number.

259428691 is a deficient number, since it is larger than the sum of its proper divisors (1).

259428691 is an equidigital number, since it uses as much as digits as its factorization.

259428691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The square root of 259428691 is about 16106.7902140681. The cubic root of 259428691 is about 637.7826021684.

The spelling of 259428691 in words is "two hundred fifty-nine million, four hundred twenty-eight thousand, six hundred ninety-one".