979783 has 4 divisors (see below), whose sum is σ = 1119760. Its totient is φ = 839808.

The previous prime is 979757. The next prime is 979787. The reversal of 979783 is 387979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 387979 = 383 ⋅1013.

It is a 8-Lehmer number, since φ(979783) divides (979783-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 979783 - 2¹³ = 971591 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69978 + ... + 69991.

It is an arithmetic number, because the mean of its divisors is an integer number (279940).

2⁹⁷⁹⁷⁸³ is an apocalyptic number.

979783 is a deficient number, since it is larger than the sum of its proper divisors (139977).

979783 is a wasteful number, since it uses less digits than its factorization.

979783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139976.

The product of its digits is 95256, while the sum is 43.

The square root of 979783 is about 989.8398860422. The cubic root of 979783 is about 99.3215068824.

The spelling of 979783 in words is "nine hundred seventy-nine thousand, seven hundred eighty-three".