6999823 has 2 divisors, whose sum is σ = 6999824. Its totient is φ = 6999822.

The previous prime is 6999821. The next prime is 6999829. The reversal of 6999823 is 3289996.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6999823 - 2¹ = 6999821 is a prime.

Together with 6999821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6999821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499911 + 3499912.

It is an arithmetic number, because the mean of its divisors is an integer number (3499912).

Almost surely, 2^6999823 is an apocalyptic number.

6999823 is a deficient number, since it is larger than the sum of its proper divisors (1).

6999823 is an equidigital number, since it uses as much as digits as its factorization.

6999823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 6999823 is about 2645.7178609973. The cubic root of 6999823 is about 191.2915059359.

The spelling of 6999823 in words is "six million, nine hundred ninety-nine thousand, eight hundred twenty-three".