243426666419 has 2 divisors, whose sum is σ = 243426666420. Its totient is φ = 243426666418.

The previous prime is 243426666401. The next prime is 243426666467. The reversal of 243426666419 is 914666624342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243426666419 - 2⁸ = 243426666163 is a prime.

It is a super-2 number, since 2×243426666419² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243426666719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121713333209 + 121713333210.

It is an arithmetic number, because the mean of its divisors is an integer number (121713333210).

Almost surely, 2^243426666419 is an apocalyptic number.

243426666419 is a deficient number, since it is larger than the sum of its proper divisors (1).

243426666419 is an equidigital number, since it uses as much as digits as its factorization.

243426666419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 53.

The spelling of 243426666419 in words is "two hundred forty-three billion, four hundred twenty-six million, six hundred sixty-six thousand, four hundred nineteen".