6990329 has 4 divisors (see below), whose sum is σ = 7122276. Its totient is φ = 6858384.

The previous prime is 6990323. The next prime is 6990331. The reversal of 6990329 is 9230996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3892729 + 3097600 = 1973^2 + 1760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6990329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6990292 and 6990301.

It is not an unprimeable number, because it can be changed into a prime (6990323) 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, 65894 + ... + 65999.

It is an arithmetic number, because the mean of its divisors is an integer number (1780569).

Almost surely, 2^6990329 is an apocalyptic number.

It is an amenable number.

6990329 is a deficient number, since it is larger than the sum of its proper divisors (131947).

6990329 is a wasteful number, since it uses less digits than its factorization.

6990329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131946.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 6990329 is about 2643.9230321626. The cubic root of 6990329 is about 191.2049826406.

The spelling of 6990329 in words is "six million, nine hundred ninety thousand, three hundred twenty-nine".