1683516685 has 4 divisors (see below), whose sum is σ = 2020220028. Its totient is φ = 1346813344.

The previous prime is 1683516677. The next prime is 1683516697. The reversal of 1683516685 is 5866153861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5866153861 = 97 ⋅60475813.

It can be written as a sum of positive squares in 2 ways, for example, as 270734116 + 1412782569 = 16454^2 + 37587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683516685 - 2³ = 1683516677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168351664 + ... + 168351673.

It is an arithmetic number, because the mean of its divisors is an integer number (505055007).

Almost surely, 2^1683516685 is an apocalyptic number.

It is an amenable number.

1683516685 is a deficient number, since it is larger than the sum of its proper divisors (336703343).

1683516685 is an equidigital number, since it uses as much as digits as its factorization.

1683516685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336703342.

The product of its digits is 1036800, while the sum is 49.

The square root of 1683516685 is about 41030.6798018263. The cubic root of 1683516685 is about 1189.6132926561.

The spelling of 1683516685 in words is "one billion, six hundred eighty-three million, five hundred sixteen thousand, six hundred eighty-five".