1679965669 has 2 divisors, whose sum is σ = 1679965670. Its totient is φ = 1679965668.

The previous prime is 1679965643. The next prime is 1679965759. The reversal of 1679965669 is 9665699761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031244769 + 648720900 = 32113^2 + 25470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679965669 - 2¹⁹ = 1679441381 is a prime.

It is a super-2 number, since 2×1679965669² = 5644569298037235122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1679965669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1679965369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839982834 + 839982835.

It is an arithmetic number, because the mean of its divisors is an integer number (839982835).

Almost surely, 2^1679965669 is an apocalyptic number.

It is an amenable number.

1679965669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679965669 is an equidigital number, since it uses as much as digits as its factorization.

1679965669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33067440, while the sum is 64.

The square root of 1679965669 is about 40987.3842663813. The cubic root of 1679965669 is about 1188.7762928473.

The spelling of 1679965669 in words is "one billion, six hundred seventy-nine million, nine hundred sixty-five thousand, six hundred sixty-nine".