243258959 has 2 divisors, whose sum is σ = 243258960. Its totient is φ = 243258958.

The previous prime is 243258901. The next prime is 243258991. The reversal of 243258959 is 959852342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243258959 - 2²⁴ = 226481743 is a prime.

It is a super-2 number, since 2×243258959² = 118349842267527362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243251959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121629479 + 121629480.

It is an arithmetic number, because the mean of its divisors is an integer number (121629480).

Almost surely, 2^243258959 is an apocalyptic number.

243258959 is a deficient number, since it is larger than the sum of its proper divisors (1).

243258959 is an equidigital number, since it uses as much as digits as its factorization.

243258959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 47.

The square root of 243258959 is about 15596.7611701917. The cubic root of 243258959 is about 624.2467375311.

The spelling of 243258959 in words is "two hundred forty-three million, two hundred fifty-eight thousand, nine hundred fifty-nine".