6987009 has 16 divisors (see below), whose sum is σ = 9820800. Its totient is φ = 4409856.

The previous prime is 6986981. The next prime is 6987031. The reversal of 6987009 is 9007896.

It is not a de Polignac number, because 6987009 - 2⁵ = 6986977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6987109) 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, 7057 + ... + 7985.

It is an arithmetic number, because the mean of its divisors is an integer number (613800).

Almost surely, 2^6987009 is an apocalyptic number.

6987009 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

6987009 is a deficient number, since it is larger than the sum of its proper divisors (2833791).

6987009 is a wasteful number, since it uses less digits than its factorization.

6987009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 6987009 is about 2643.2951027080. The cubic root of 6987009 is about 191.1747074292.

It can be divided in two parts, 69 and 87009, that added together give a palindrome (87078).

The spelling of 6987009 in words is "six million, nine hundred eighty-seven thousand, nine".