398436039811 has 2 divisors, whose sum is σ = 398436039812. Its totient is φ = 398436039810.

The previous prime is 398436039809. The next prime is 398436039889. The reversal of 398436039811 is 118930634893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398436039811 - 2¹ = 398436039809 is a prime.

Together with 398436039809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (398436049811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199218019905 + 199218019906.

It is an arithmetic number, because the mean of its divisors is an integer number (199218019906).

Almost surely, 2^398436039811 is an apocalyptic number.

398436039811 is a deficient number, since it is larger than the sum of its proper divisors (1).

398436039811 is an equidigital number, since it uses as much as digits as its factorization.

398436039811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 398436039811 in words is "three hundred ninety-eight billion, four hundred thirty-six million, thirty-nine thousand, eight hundred eleven".