6398820941 has 2 divisors, whose sum is σ = 6398820942. Its totient is φ = 6398820940.

The previous prime is 6398820929. The next prime is 6398821001. The reversal of 6398820941 is 1490288936.

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., 3312462916 + 3086358025 = 57554^2 + 55555^2 .

It is a cyclic number.

It is not a de Polignac number, because 6398820941 - 2⁶ = 6398820877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6398820941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6398720941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199410470 + 3199410471.

It is an arithmetic number, because the mean of its divisors is an integer number (3199410471).

Almost surely, 2^6398820941 is an apocalyptic number.

It is an amenable number.

6398820941 is a deficient number, since it is larger than the sum of its proper divisors (1).

6398820941 is an equidigital number, since it uses as much as digits as its factorization.

6398820941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 6398820941 is about 79992.6305418193. The cubic root of 6398820941 is about 1856.5215117118.

The spelling of 6398820941 in words is "six billion, three hundred ninety-eight million, eight hundred twenty thousand, nine hundred forty-one".