398508811 has 2 divisors, whose sum is σ = 398508812. Its totient is φ = 398508810.

The previous prime is 398508797. The next prime is 398508841. The reversal of 398508811 is 118805893.

It is a weak prime.

It is an emirp because it is prime and its reverse (118805893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398508811 - 2⁵ = 398508779 is a prime.

It is not a weakly prime, because it can be changed into another prime (398508841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199254405 + 199254406.

It is an arithmetic number, because the mean of its divisors is an integer number (199254406).

Almost surely, 2^398508811 is an apocalyptic number.

398508811 is a deficient number, since it is larger than the sum of its proper divisors (1).

398508811 is an equidigital number, since it uses as much as digits as its factorization.

398508811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 43.

The square root of 398508811 is about 19962.6854656381. The cubic root of 398508811 is about 735.8895617168.

The spelling of 398508811 in words is "three hundred ninety-eight million, five hundred eight thousand, eight hundred eleven".