1689079849 has 8 divisors (see below), whose sum is σ = 1717183328. Its totient is φ = 1661061600.

The previous prime is 1689079811. The next prime is 1689079853. The reversal of 1689079849 is 9489709861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1689079849 - 2¹⁵ = 1689047081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689079349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19294 + ... + 61240.

It is an arithmetic number, because the mean of its divisors is an integer number (214647916).

Almost surely, 2^1689079849 is an apocalyptic number.

It is an amenable number.

1689079849 is a deficient number, since it is larger than the sum of its proper divisors (28103479).

1689079849 is an equidigital number, since it uses as much as digits as its factorization.

1689079849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42615.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 1689079849 is about 41098.4166240015. The cubic root of 1689079849 is about 1190.9222070129.

The spelling of 1689079849 in words is "one billion, six hundred eighty-nine million, seventy-nine thousand, eight hundred forty-nine".