1683452081 has 4 divisors (see below), whose sum is σ = 1782478692. Its totient is φ = 1584425472.

The previous prime is 1683452077. The next prime is 1683452093. The reversal of 1683452081 is 1802543861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1802543861 = 6653 ⋅270937.

It can be written as a sum of positive squares in 2 ways, for example, as 1409251600 + 274200481 = 37540^2 + 16559^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683452081 - 2² = 1683452077 is a prime.

It is a super-2 number, since 2×1683452081² = 5668021818046461122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1683458081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49513280 + ... + 49513313.

It is an arithmetic number, because the mean of its divisors is an integer number (445619673).

Almost surely, 2^1683452081 is an apocalyptic number.

It is an amenable number.

1683452081 is a deficient number, since it is larger than the sum of its proper divisors (99026611).

1683452081 is an equidigital number, since it uses as much as digits as its factorization.

1683452081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99026610.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 1683452081 is about 41029.8925297155. The cubic root of 1683452081 is about 1189.5980755492.

The spelling of 1683452081 in words is "one billion, six hundred eighty-three million, four hundred fifty-two thousand, eighty-one".