6993409 has 8 divisors (see below), whose sum is σ = 7482888. Its totient is φ = 6512640.

The previous prime is 6993401. The next prime is 6993421. The reversal of 6993409 is 9043996.

It can be written as a sum of positive squares in 4 ways, for example, as 3920400 + 3073009 = 1980^2 + 1753^2 .

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 6993409 - 2³ = 6993401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6993401) 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, 472 + ... + 3769.

It is an arithmetic number, because the mean of its divisors is an integer number (935361).

Almost surely, 2^6993409 is an apocalyptic number.

It is an amenable number.

6993409 is a deficient number, since it is larger than the sum of its proper divisors (489479).

6993409 is a wasteful number, since it uses less digits than its factorization.

6993409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 6993409 is about 2644.5054358046. The cubic root of 6993409 is about 191.2330607122.

The spelling of 6993409 in words is "six million, nine hundred ninety-three thousand, four hundred nine".