79783 has 4 divisors (see below), whose sum is σ = 87048. Its totient is φ = 72520.

The previous prime is 79777. The next prime is 79801. The reversal of 79783 is 38797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38797 = 11 ⋅3527.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79783 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 (79283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3616 + ... + 3637.

It is an arithmetic number, because the mean of its divisors is an integer number (21762).

2⁷⁹⁷⁸³ is an apocalyptic number.

79783 is a deficient number, since it is larger than the sum of its proper divisors (7265).

79783 is a wasteful number, since it uses less digits than its factorization.

79783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7264.

The product of its digits is 10584, while the sum is 34.

The square root of 79783 is about 282.4588465600. The cubic root of 79783 is about 43.0496991611.

The spelling of 79783 in words is "seventy-nine thousand, seven hundred eighty-three".