6978945 has 16 divisors (see below), whose sum is σ = 11325312. Its totient is φ = 3669120.

The previous prime is 6978941. The next prime is 6978973. The reversal of 6978945 is 5498796.

It is not a de Polignac number, because 6978945 - 2² = 6978941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6978894 and 6978903.

It is not an unprimeable number, because it can be changed into a prime (6978941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2212 + ... + 4341.

It is an arithmetic number, because the mean of its divisors is an integer number (707832).

Almost surely, 2^6978945 is an apocalyptic number.

It is an amenable number.

6978945 is a deficient number, since it is larger than the sum of its proper divisors (4346367).

6978945 is a wasteful number, since it uses less digits than its factorization.

6978945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632.

The product of its digits is 544320, while the sum is 48.

The square root of 6978945 is about 2641.7692934850. The cubic root of 6978945 is about 191.1011315348.

The spelling of 6978945 in words is "six million, nine hundred seventy-eight thousand, nine hundred forty-five".