6989691 has 8 divisors (see below), whose sum is σ = 9337680. Its totient is φ = 4650752.

The previous prime is 6989687. The next prime is 6989713. The reversal of 6989691 is 1969896.

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

It is a cyclic number.

It is not a de Polignac number, because 6989691 - 2² = 6989687 is a prime.

6989691 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6989691.

It is not an unprimeable number, because it can be changed into a prime (6989651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (1167210).

Almost surely, 2^6989691 is an apocalyptic number.

6989691 is a deficient number, since it is larger than the sum of its proper divisors (2347989).

6989691 is a wasteful number, since it uses less digits than its factorization.

6989691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525.

The product of its digits is 209952, while the sum is 48.

The square root of 6989691 is about 2643.8023753677. The cubic root of 6989691 is about 191.1991654376.

The spelling of 6989691 in words is "six million, nine hundred eighty-nine thousand, six hundred ninety-one".