1671688349 has 2 divisors, whose sum is σ = 1671688350. Its totient is φ = 1671688348.

The previous prime is 1671688327. The next prime is 1671688411. The reversal of 1671688349 is 9438861761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1636202500 + 35485849 = 40450^2 + 5957^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671688349 - 2¹² = 1671684253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1671688349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671688649) 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, 835844174 + 835844175.

It is an arithmetic number, because the mean of its divisors is an integer number (835844175).

Almost surely, 2^1671688349 is an apocalyptic number.

It is an amenable number.

1671688349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671688349 is an equidigital number, since it uses as much as digits as its factorization.

1671688349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 1671688349 is about 40886.2855857560. The cubic root of 1671688349 is about 1186.8206801095.

The spelling of 1671688349 in words is "one billion, six hundred seventy-one million, six hundred eighty-eight thousand, three hundred forty-nine".