1689718804 has 6 divisors (see below), whose sum is σ = 2957007914. Its totient is φ = 844859400.

The previous prime is 1689718801. The next prime is 1689718813. The reversal of 1689718804 is 4088179861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1685266704 + 4452100 = 41052^2 + 2110^2 .

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 polite number, since it can be written as a sum of consecutive naturals, namely, 211214847 + ... + 211214854.

Almost surely, 2^1689718804 is an apocalyptic number.

It is an amenable number.

1689718804 is a deficient number, since it is larger than the sum of its proper divisors (1267289110).

1689718804 is a wasteful number, since it uses less digits than its factorization.

1689718804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422429705 (or 422429703 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 1689718804 is about 41106.1893636469. The cubic root of 1689718804 is about 1191.0723577528.

The spelling of 1689718804 in words is "one billion, six hundred eighty-nine million, seven hundred eighteen thousand, eight hundred four".