1689718805 has 8 divisors (see below), whose sum is σ = 2115821952. Its totient is φ = 1293002128.

The previous prime is 1689718801. The next prime is 1689718813. The reversal of 1689718805 is 5088179861.

1689718805 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 1689718805 - 2² = 1689718801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689718801) 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, 7346489 + ... + 7346718.

It is an arithmetic number, because the mean of its divisors is an integer number (264477744).

Almost surely, 2^1689718805 is an apocalyptic number.

It is an amenable number.

1689718805 is a deficient number, since it is larger than the sum of its proper divisors (426103147).

1689718805 is a wasteful number, since it uses less digits than its factorization.

1689718805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14693235.

The product of its (nonzero) digits is 967680, while the sum is 53.

The square root of 1689718805 is about 41106.1893758105. The cubic root of 1689718805 is about 1191.0723579878.

The spelling of 1689718805 in words is "one billion, six hundred eighty-nine million, seven hundred eighteen thousand, eight hundred five".