398334433853 has 2 divisors, whose sum is σ = 398334433854. Its totient is φ = 398334433852.

The previous prime is 398334433841. The next prime is 398334433921. The reversal of 398334433853 is 358334433893.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329088090244 + 69246343609 = 573662^2 + 263147^2 .

It is a cyclic number.

It is not a de Polignac number, because 398334433853 - 2²⁰ = 398333385277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398334433813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199167216926 + 199167216927.

It is an arithmetic number, because the mean of its divisors is an integer number (199167216927).

Almost surely, 2^398334433853 is an apocalyptic number.

It is an amenable number.

398334433853 is a deficient number, since it is larger than the sum of its proper divisors (1).

398334433853 is an equidigital number, since it uses as much as digits as its factorization.

398334433853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33592320, while the sum is 56.

The spelling of 398334433853 in words is "three hundred ninety-eight billion, three hundred thirty-four million, four hundred thirty-three thousand, eight hundred fifty-three".