6990623 has 4 divisors (see below), whose sum is σ = 7161168. Its totient is φ = 6820080.

The previous prime is 6990619. The next prime is 6990629. The reversal of 6990623 is 3260996.

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

It is a cyclic number.

It is not a de Polignac number, because 6990623 - 2² = 6990619 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 (6990629) 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, 85211 + ... + 85292.

It is an arithmetic number, because the mean of its divisors is an integer number (1790292).

Almost surely, 2^6990623 is an apocalyptic number.

6990623 is a deficient number, since it is larger than the sum of its proper divisors (170545).

6990623 is a wasteful number, since it uses less digits than its factorization.

6990623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170544.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 6990623 is about 2643.9786307760. The cubic root of 6990623 is about 191.2076631762.

The spelling of 6990623 in words is "six million, nine hundred ninety thousand, six hundred twenty-three".