424243331209 has 2 divisors, whose sum is σ = 424243331210. Its totient is φ = 424243331208.

The previous prime is 424243331137. The next prime is 424243331233. The reversal of 424243331209 is 902133342424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232543843984 + 191699487225 = 482228^2 + 437835^2 .

It is a cyclic number.

It is not a de Polignac number, because 424243331209 - 2¹³ = 424243323017 is a prime.

It is not a weakly prime, because it can be changed into another prime (424243331299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212121665604 + 212121665605.

It is an arithmetic number, because the mean of its divisors is an integer number (212121665605).

Almost surely, 2^424243331209 is an apocalyptic number.

It is an amenable number.

424243331209 is a deficient number, since it is larger than the sum of its proper divisors (1).

424243331209 is an equidigital number, since it uses as much as digits as its factorization.

424243331209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 424243331209 in words is "four hundred twenty-four billion, two hundred forty-three million, three hundred thirty-one thousand, two hundred nine".