1006623 has 6 divisors (see below), whose sum is σ = 1454024. Its totient is φ = 671076.

The previous prime is 1006613. The next prime is 1006633. The reversal of 1006623 is 3266001.

It is a happy number.

1006623 is a `hidden beast` number, since 1 + 0 + 0 + 662 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1006613) and next prime (1006633).

It is not a de Polignac number, because 1006623 - 2⁶ = 1006559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1006596 and 1006605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006613) 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 5 ways as a sum of consecutive naturals, for example, 55915 + ... + 55932.

2^1006623 is an apocalyptic number.

1006623 is a deficient number, since it is larger than the sum of its proper divisors (447401).

1006623 is a wasteful number, since it uses less digits than its factorization.

1006623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111853 (or 111850 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1006623 is about 1003.3060350661. The cubic root of 1006623 is about 100.2202810729.

The spelling of 1006623 in words is "one million, six thousand, six hundred twenty-three".