1689339861 has 128 divisors (see below), whose sum is σ = 3023308800. Its totient is φ = 920724480.

The previous prime is 1689339833. The next prime is 1689339863.

1689339861 is a `hidden beast` number, since 168 + 93 + 398 + 6 + 1 = 666.

1689339861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1689339861 - 2⁵ = 1689339829 is a prime.

Its product of digits (1679616) is a multiple of the sum of its prime factors (256).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1689339798 and 1689339807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689339863) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 15788170 + ... + 15788276.

It is an arithmetic number, because the mean of its divisors is an integer number (23619600).

Almost surely, 2^1689339861 is an apocalyptic number.

1689339861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1689339861 is a deficient number, since it is larger than the sum of its proper divisors (1333968939).

1689339861 is a wasteful number, since it uses less digits than its factorization.

1689339861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 250 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1689339861 is about 41101.5797871566. The cubic root of 1689339861 is about 1190.9833129019.

The spelling of 1689339861 in words is "one billion, six hundred eighty-nine million, three hundred thirty-nine thousand, eight hundred sixty-one".