398022020009 has 2 divisors, whose sum is σ = 398022020010. Its totient is φ = 398022020008.

The previous prime is 398022019981. The next prime is 398022020069. The reversal of 398022020009 is 900020220893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397975507609 + 46512400 = 630853^2 + 6820^2 .

It is an emirp because it is prime and its reverse (900020220893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398022020009 - 2²⁰ = 398020971433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (398022020069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199011010004 + 199011010005.

It is an arithmetic number, because the mean of its divisors is an integer number (199011010005).

Almost surely, 2^398022020009 is an apocalyptic number.

It is an amenable number.

398022020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

398022020009 is an equidigital number, since it uses as much as digits as its factorization.

398022020009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 398022020009 in words is "three hundred ninety-eight billion, twenty-two million, twenty thousand, nine".