6990003 has 16 divisors (see below), whose sum is σ = 10636960. Its totient is φ = 4533408.

The previous prime is 6990001. The next prime is 6990017. The reversal of 6990003 is 3000996.

It is not a de Polignac number, because 6990003 - 2¹ = 6990001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6990001) 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, 2500 + ... + 4497.

It is an arithmetic number, because the mean of its divisors is an integer number (664810).

Almost surely, 2^6990003 is an apocalyptic number.

6990003 is a deficient number, since it is larger than the sum of its proper divisors (3646957).

6990003 is a wasteful number, since it uses less digits than its factorization.

6990003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7043 (or 7037 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 6990003 is about 2643.8613806325. The cubic root of 6990003 is about 191.2020102582.

Adding to 6990003 its reverse (3000996), we get a palindrome (9990999).

The spelling of 6990003 in words is "six million, nine hundred ninety thousand, three".