259420409 has 2 divisors, whose sum is σ = 259420410. Its totient is φ = 259420408.

The previous prime is 259420393. The next prime is 259420423. The reversal of 259420409 is 904024952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242487184 + 16933225 = 15572^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 259420409 - 2⁴ = 259420393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259420709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129710204 + 129710205.

It is an arithmetic number, because the mean of its divisors is an integer number (129710205).

Almost surely, 2^259420409 is an apocalyptic number.

It is an amenable number.

259420409 is a deficient number, since it is larger than the sum of its proper divisors (1).

259420409 is an equidigital number, since it uses as much as digits as its factorization.

259420409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 259420409 is about 16106.5331154783. The cubic root of 259420409 is about 637.7758152402.

The spelling of 259420409 in words is "two hundred fifty-nine million, four hundred twenty thousand, four hundred nine".