42998264209 has 2 divisors, whose sum is σ = 42998264210. Its totient is φ = 42998264208.

The previous prime is 42998264207. The next prime is 42998264233. The reversal of 42998264209 is 90246289924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29677641984 + 13320622225 = 172272^2 + 115415^2 .

It is a cyclic number.

It is not a de Polignac number, because 42998264209 - 2¹ = 42998264207 is a prime.

Together with 42998264207, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42998264209.

It is not a weakly prime, because it can be changed into another prime (42998264207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499132104 + 21499132105.

It is an arithmetic number, because the mean of its divisors is an integer number (21499132105).

Almost surely, 2^42998264209 is an apocalyptic number.

It is an amenable number.

42998264209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42998264209 is an equidigital number, since it uses as much as digits as its factorization.

42998264209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 42998264209 in words is "forty-two billion, nine hundred ninety-eight million, two hundred sixty-four thousand, two hundred nine".