6978355 has 4 divisors (see below), whose sum is σ = 8374032. Its totient is φ = 5582680.

The previous prime is 6978319. The next prime is 6978371. The reversal of 6978355 is 5538796.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6978355 - 2⁷ = 6978227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697831 + ... + 697840.

It is an arithmetic number, because the mean of its divisors is an integer number (2093508).

Almost surely, 2^6978355 is an apocalyptic number.

6978355 is a deficient number, since it is larger than the sum of its proper divisors (1395677).

6978355 is a wasteful number, since it uses less digits than its factorization.

6978355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395676.

The product of its digits is 226800, while the sum is 43.

The square root of 6978355 is about 2641.6576235387. The cubic root of 6978355 is about 191.0957461532.

The spelling of 6978355 in words is "six million, nine hundred seventy-eight thousand, three hundred fifty-five".