6987945 has 16 divisors (see below), whose sum is σ = 11324160. Its totient is φ = 3679104.

The previous prime is 6987943. The next prime is 6987949. The reversal of 6987945 is 5497896.

It is not a de Polignac number, because 6987945 - 2¹ = 6987943 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6987894 and 6987903.

It is not an unprimeable number, because it can be changed into a prime (6987941) 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, 1764 + ... + 4133.

It is an arithmetic number, because the mean of its divisors is an integer number (707760).

Almost surely, 2^6987945 is an apocalyptic number.

It is an amenable number.

6987945 is a deficient number, since it is larger than the sum of its proper divisors (4336215).

6987945 is a wasteful number, since it uses less digits than its factorization.

6987945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984.

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

The square root of 6987945 is about 2643.4721485198. The cubic root of 6987945 is about 191.1832438208.

The spelling of 6987945 in words is "six million, nine hundred eighty-seven thousand, nine hundred forty-five".