778983 has 8 divisors (see below), whose sum is σ = 1053168. Its totient is φ = 512064.

The previous prime is 778979. The next prime is 778993. The reversal of 778983 is 389877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 778983 - 2² = 778979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778903) 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 7 ways as a sum of consecutive naturals, for example, 1560 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (131646).

2⁷⁷⁸⁹⁸³ is an apocalyptic number.

778983 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

778983 is a deficient number, since it is larger than the sum of its proper divisors (274185).

778983 is a wasteful number, since it uses less digits than its factorization.

778983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633.

The product of its digits is 84672, while the sum is 42.

The square root of 778983 is about 882.6001359619. The cubic root of 778983 is about 92.0116163656.

The spelling of 778983 in words is "seven hundred seventy-eight thousand, nine hundred eighty-three".