1689769369 has 8 divisors (see below), whose sum is σ = 1701312840. Its totient is φ = 1678246656.

The previous prime is 1689769321. The next prime is 1689769379. The reversal of 1689769369 is 9639679861.

It can be written as a sum of positive squares in 4 ways, for example, as 125171344 + 1564598025 = 11188^2 + 39555^2 .

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 1689769369 - 2⁷ = 1689769241 is a prime.

It is a super-2 number, since 2×1689769369² = 5710641040821316322, which contains 22 as substring.

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 1689769369.

It is not an unprimeable number, because it can be changed into a prime (1689769309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180369 + ... + 189505.

It is an arithmetic number, because the mean of its divisors is an integer number (212664105).

Almost surely, 2^1689769369 is an apocalyptic number.

It is an amenable number.

1689769369 is a deficient number, since it is larger than the sum of its proper divisors (11543471).

1689769369 is a wasteful number, since it uses less digits than its factorization.

1689769369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10379.

The product of its digits is 26453952, while the sum is 64.

The square root of 1689769369 is about 41106.8044124084. The cubic root of 1689769369 is about 1191.0842386198.

The spelling of 1689769369 in words is "one billion, six hundred eighty-nine million, seven hundred sixty-nine thousand, three hundred sixty-nine".