7681983 has 4 divisors (see below), whose sum is σ = 10242648. Its totient is φ = 5121320.

The previous prime is 7681969. The next prime is 7681991. The reversal of 7681983 is 3891867.

7681983 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7681983 - 2¹³ = 7673791 is a prime.

7681983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280328 + ... + 1280333.

It is an arithmetic number, because the mean of its divisors is an integer number (2560662).

Almost surely, 2^7681983 is an apocalyptic number.

7681983 is a deficient number, since it is larger than the sum of its proper divisors (2560665).

7681983 is a wasteful number, since it uses less digits than its factorization.

7681983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560664.

The product of its digits is 72576, while the sum is 42.

The square root of 7681983 is about 2771.6390457634. The cubic root of 7681983 is about 197.3139453829.

The spelling of 7681983 in words is "seven million, six hundred eighty-one thousand, nine hundred eighty-three".