6978505 has 8 divisors (see below), whose sum is σ = 8399232. Its totient is φ = 5566128.

The previous prime is 6978481. The next prime is 6978511. The reversal of 6978505 is 5058796.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6978505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67 + ... + 3736.

It is an arithmetic number, because the mean of its divisors is an integer number (1049904).

Almost surely, 2^6978505 is an apocalyptic number.

It is an amenable number.

6978505 is a deficient number, since it is larger than the sum of its proper divisors (1420727).

6978505 is a wasteful number, since it uses less digits than its factorization.

6978505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 6978505 is about 2641.6860146505. The cubic root of 6978505 is about 191.0971153468.

The spelling of 6978505 in words is "six million, nine hundred seventy-eight thousand, five hundred five".