1981983073 has 8 divisors (see below), whose sum is σ = 2266038720. Its totient is φ = 1698156240.

The previous prime is 1981983067. The next prime is 1981983089. The reversal of 1981983073 is 3703891891.

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 1981983073 - 2²⁵ = 1948428641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981986073) 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, 38218 + ... + 73651.

It is an arithmetic number, because the mean of its divisors is an integer number (283254840).

Almost surely, 2^1981983073 is an apocalyptic number.

It is an amenable number.

1981983073 is a deficient number, since it is larger than the sum of its proper divisors (284055647).

1981983073 is a wasteful number, since it uses less digits than its factorization.

1981983073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114407.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 1981983073 is about 44519.4684716698. The cubic root of 1981983073 is about 1256.1263144715.

The spelling of 1981983073 in words is "one billion, nine hundred eighty-one million, nine hundred eighty-three thousand, seventy-three".