398937019843 has 2 divisors, whose sum is σ = 398937019844. Its totient is φ = 398937019842.

The previous prime is 398937019801. The next prime is 398937019849. The reversal of 398937019843 is 348910739893.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (348910739893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398937019843 - 2²¹ = 398934922691 is a prime.

It is not a weakly prime, because it can be changed into another prime (398937019849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199468509921 + 199468509922.

It is an arithmetic number, because the mean of its divisors is an integer number (199468509922).

Almost surely, 2^398937019843 is an apocalyptic number.

398937019843 is a deficient number, since it is larger than the sum of its proper divisors (1).

398937019843 is an equidigital number, since it uses as much as digits as its factorization.

398937019843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 398937019843 in words is "three hundred ninety-eight billion, nine hundred thirty-seven million, nineteen thousand, eight hundred forty-three".