6693989 has 4 divisors (see below), whose sum is σ = 6985056. Its totient is φ = 6402924.

The previous prime is 6693961. The next prime is 6693991. The reversal of 6693989 is 9893966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-6693989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6693949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145499 + ... + 145544.

It is an arithmetic number, because the mean of its divisors is an integer number (1746264).

Almost surely, 2^6693989 is an apocalyptic number.

It is an amenable number.

6693989 is a deficient number, since it is larger than the sum of its proper divisors (291067).

6693989 is a wasteful number, since it uses less digits than its factorization.

6693989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291066.

The product of its digits is 629856, while the sum is 50.

The square root of 6693989 is about 2587.2744346126. The cubic root of 6693989 is about 188.4639683280.

The spelling of 6693989 in words is "six million, six hundred ninety-three thousand, nine hundred eighty-nine".