1983687773 has 4 divisors (see below), whose sum is σ = 2003328348. Its totient is φ = 1964047200.

The previous prime is 1983687743. The next prime is 1983687779. The reversal of 1983687773 is 3777863891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3777863891 = 4513 ⋅837107.

It can be written as a sum of positive squares in 2 ways, for example, as 1821838489 + 161849284 = 42683^2 + 12722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1983687773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983687779) 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, 9820136 + ... + 9820337.

It is an arithmetic number, because the mean of its divisors is an integer number (500832087).

Almost surely, 2^1983687773 is an apocalyptic number.

It is an amenable number.

1983687773 is a deficient number, since it is larger than the sum of its proper divisors (19640575).

1983687773 is a wasteful number, since it uses less digits than its factorization.

1983687773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19640574.

The product of its digits is 10668672, while the sum is 59.

The square root of 1983687773 is about 44538.6099131978. The cubic root of 1983687773 is about 1256.4863419167.

The spelling of 1983687773 in words is "one billion, nine hundred eighty-three million, six hundred eighty-seven thousand, seven hundred seventy-three".