6983978 has 8 divisors (see below), whose sum is σ = 10491168. Its totient is φ = 3486924.

The previous prime is 6983971. The next prime is 6983987. The reversal of 6983978 is 8793896.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6983971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476 + ... + 3767.

It is an arithmetic number, because the mean of its divisors is an integer number (1311396).

Almost surely, 2^6983978 is an apocalyptic number.

6983978 is a deficient number, since it is larger than the sum of its proper divisors (3507190).

6983978 is a wasteful number, since it uses less digits than its factorization.

6983978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068.

The product of its digits is 653184, while the sum is 50.

The square root of 6983978 is about 2642.7217030932. The cubic root of 6983978 is about 191.1470592444.

The spelling of 6983978 in words is "six million, nine hundred eighty-three thousand, nine hundred seventy-eight".