6620923 has 4 divisors (see below), whose sum is σ = 6626560. Its totient is φ = 6615288.

The previous prime is 6620899. The next prime is 6620927. The reversal of 6620923 is 3290266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6620923 - 2¹³ = 6612731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6620891 and 6620900.

It is not an unprimeable number, because it can be changed into a prime (6620927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315 + ... + 3652.

It is an arithmetic number, because the mean of its divisors is an integer number (1656640).

Almost surely, 2^6620923 is an apocalyptic number.

6620923 is a deficient number, since it is larger than the sum of its proper divisors (5637).

6620923 is a wasteful number, since it uses less digits than its factorization.

6620923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5636.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 6620923 is about 2573.1154268707. The cubic root of 6620923 is about 187.7757530706.

The spelling of 6620923 in words is "six million, six hundred twenty thousand, nine hundred twenty-three".