1623166 has 4 divisors (see below), whose sum is σ = 2434752. Its totient is φ = 811582.

The previous prime is 1623163. The next prime is 1623169. The reversal of 1623166 is 6613261.

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

It is an interprime number because it is at equal distance from previous prime (1623163) and next prime (1623169).

It is a self number, because there is not a number n which added to its sum of digits gives 1623166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405790 + ... + 405793.

It is an arithmetic number, because the mean of its divisors is an integer number (608688).

2^1623166 is an apocalyptic number.

1623166 is a deficient number, since it is larger than the sum of its proper divisors (811586).

1623166 is an equidigital number, since it uses as much as digits as its factorization.

1623166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811585.

The product of its digits is 1296, while the sum is 25.

The square root of 1623166 is about 1274.0353213314. The cubic root of 1623166 is about 117.5224885280.

The spelling of 1623166 in words is "one million, six hundred twenty-three thousand, one hundred sixty-six".