1685120669 has 8 divisors (see below), whose sum is σ = 1717940640. Its totient is φ = 1652468400.

The previous prime is 1685120629. The next prime is 1685120683. The reversal of 1685120669 is 9660215861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685120669 is a prime.

It is a super-2 number, since 2×1685120669² = 5679263338182015122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685120609) 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, 21539 + ... + 61920.

It is an arithmetic number, because the mean of its divisors is an integer number (214742580).

Almost surely, 2^1685120669 is an apocalyptic number.

It is an amenable number.

1685120669 is a deficient number, since it is larger than the sum of its proper divisors (32819971).

1685120669 is an equidigital number, since it uses as much as digits as its factorization.

1685120669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83851.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 1685120669 is about 41050.2213026921. The cubic root of 1685120669 is about 1189.9909772637.

The spelling of 1685120669 in words is "one billion, six hundred eighty-five million, one hundred twenty thousand, six hundred sixty-nine".