399853821859 has 2 divisors, whose sum is σ = 399853821860. Its totient is φ = 399853821858.

The previous prime is 399853821847. The next prime is 399853821877. The reversal of 399853821859 is 958128358993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399853821859 - 2⁹ = 399853821347 is a prime.

It is not a weakly prime, because it can be changed into another prime (399853821889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199926910929 + 199926910930.

It is an arithmetic number, because the mean of its divisors is an integer number (199926910930).

Almost surely, 2^399853821859 is an apocalyptic number.

399853821859 is a deficient number, since it is larger than the sum of its proper divisors (1).

399853821859 is an equidigital number, since it uses as much as digits as its factorization.

399853821859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 167961600, while the sum is 70.

The spelling of 399853821859 in words is "three hundred ninety-nine billion, eight hundred fifty-three million, eight hundred twenty-one thousand, eight hundred fifty-nine".