396818189 has 2 divisors, whose sum is σ = 396818190. Its totient is φ = 396818188.

The previous prime is 396818183. The next prime is 396818207. The reversal of 396818189 is 981818693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374112964 + 22705225 = 19342^2 + 4765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396818189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 396818189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396818183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198409094 + 198409095.

It is an arithmetic number, because the mean of its divisors is an integer number (198409095).

Almost surely, 2^396818189 is an apocalyptic number.

It is an amenable number.

396818189 is a deficient number, since it is larger than the sum of its proper divisors (1).

396818189 is an equidigital number, since it uses as much as digits as its factorization.

396818189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 53.

The square root of 396818189 is about 19920.2959064367. The cubic root of 396818189 is about 734.8474479390.

The spelling of 396818189 in words is "three hundred ninety-six million, eight hundred eighteen thousand, one hundred eighty-nine".