671770193 has 2 divisors, whose sum is σ = 671770194. Its totient is φ = 671770192.

The previous prime is 671770189. The next prime is 671770243. The reversal of 671770193 is 391077176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458259649 + 213510544 = 21407^2 + 14612^2 .

It is a cyclic number.

It is not a de Polignac number, because 671770193 - 2² = 671770189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671770193.

It is not a weakly prime, because it can be changed into another prime (671770103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335885096 + 335885097.

It is an arithmetic number, because the mean of its divisors is an integer number (335885097).

Almost surely, 2^671770193 is an apocalyptic number.

It is an amenable number.

671770193 is a deficient number, since it is larger than the sum of its proper divisors (1).

671770193 is an equidigital number, since it uses as much as digits as its factorization.

671770193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55566, while the sum is 41.

The square root of 671770193 is about 25918.5299158729. The cubic root of 671770193 is about 875.8039709436.

The spelling of 671770193 in words is "six hundred seventy-one million, seven hundred seventy thousand, one hundred ninety-three".