1689307649 has 8 divisors (see below), whose sum is σ = 1721058240. Its totient is φ = 1657749456.

The previous prime is 1689307603. The next prime is 1689307679. The reversal of 1689307649 is 9467039861.

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 1689307649 - 2⁸ = 1689307393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1689307649.

It is not an unprimeable number, because it can be changed into a prime (1689307679) 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 in 7 ways as a sum of consecutive naturals, for example, 30314 + ... + 65555.

It is an arithmetic number, because the mean of its divisors is an integer number (215132280).

Almost surely, 2^1689307649 is an apocalyptic number.

It is an amenable number.

1689307649 is a deficient number, since it is larger than the sum of its proper divisors (31750591).

1689307649 is an equidigital number, since it uses as much as digits as its factorization.

1689307649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96199.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 1689307649 is about 41101.1879268714. The cubic root of 1689307649 is about 1190.9757430419.

The spelling of 1689307649 in words is "one billion, six hundred eighty-nine million, three hundred seven thousand, six hundred forty-nine".