6990133 has 4 divisors (see below), whose sum is σ = 7008768. Its totient is φ = 6971500.

The previous prime is 6990107. The next prime is 6990161. The reversal of 6990133 is 3310996.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6990133 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

6990133 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6990095 and 6990104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991133) 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, 8743 + ... + 9508.

It is an arithmetic number, because the mean of its divisors is an integer number (1752192).

Almost surely, 2^6990133 is an apocalyptic number.

It is an amenable number.

6990133 is a deficient number, since it is larger than the sum of its proper divisors (18635).

6990133 is a wasteful number, since it uses less digits than its factorization.

6990133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18634.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 6990133 is about 2643.8859657708. The cubic root of 6990133 is about 191.2031955752.

The spelling of 6990133 in words is "six million, nine hundred ninety thousand, one hundred thirty-three".