398159843 has 2 divisors, whose sum is σ = 398159844. Its totient is φ = 398159842.

The previous prime is 398159819. The next prime is 398159851. The reversal of 398159843 is 348951893.

It is a strong prime.

It is an emirp because it is prime and its reverse (348951893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398159843 - 2⁶ = 398159779 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 398159791 and 398159800.

It is not a weakly prime, because it can be changed into another prime (398159803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199079921 + 199079922.

It is an arithmetic number, because the mean of its divisors is an integer number (199079922).

Almost surely, 2^398159843 is an apocalyptic number.

398159843 is a deficient number, since it is larger than the sum of its proper divisors (1).

398159843 is an equidigital number, since it uses as much as digits as its factorization.

398159843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 398159843 is about 19953.9430439199. The cubic root of 398159843 is about 735.6746966188.

The spelling of 398159843 in words is "three hundred ninety-eight million, one hundred fifty-nine thousand, eight hundred forty-three".