6978438173 has 8 divisors (see below), whose sum is σ = 7979149248. Its totient is φ = 5978674944.

The previous prime is 6978438163. The next prime is 6978438193. The reversal of 6978438173 is 3718348796.

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

It is a cyclic number.

It is not a de Polignac number, because 6978438173 - 2⁶ = 6978438109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978438143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221111 + ... + 250692.

It is an arithmetic number, because the mean of its divisors is an integer number (997393656).

Almost surely, 2^6978438173 is an apocalyptic number.

It is an amenable number.

6978438173 is a deficient number, since it is larger than the sum of its proper divisors (1000711075).

6978438173 is a wasteful number, since it uses less digits than its factorization.

6978438173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473923.

The product of its digits is 6096384, while the sum is 56.

The square root of 6978438173 is about 83537.0467098281. The cubic root of 6978438173 is about 1910.9650535521.

The spelling of 6978438173 in words is "six billion, nine hundred seventy-eight million, four hundred thirty-eight thousand, one hundred seventy-three".