1676820197 has 6 divisors (see below), whose sum is σ = 1815728562. Its totient is φ = 1547833872.

The previous prime is 1676820193. The next prime is 1676820227. The reversal of 1676820197 is 7910286761.

It can be written as a sum of positive squares in 3 ways, for example, as 45144961 + 1631675236 = 6719^2 + 40394^2 .

It is not a de Polignac number, because 1676820197 - 2² = 1676820193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1676820193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4960838 + ... + 4961175.

It is an arithmetic number, because the mean of its divisors is an integer number (302621427).

Almost surely, 2^1676820197 is an apocalyptic number.

It is an amenable number.

1676820197 is a deficient number, since it is larger than the sum of its proper divisors (138908365).

1676820197 is an equidigital number, since it uses as much as digits as its factorization.

1676820197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9922039 (or 9922026 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1676820197 is about 40948.9950670343. The cubic root of 1676820197 is about 1188.0338969816.

The spelling of 1676820197 in words is "one billion, six hundred seventy-six million, eight hundred twenty thousand, one hundred ninety-seven".