1003623 has 4 divisors (see below), whose sum is σ = 1338168. Its totient is φ = 669080.

The previous prime is 1003621. The next prime is 1003627. The reversal of 1003623 is 3263001.

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 1003623 - 2¹ = 1003621 is a prime.

It is a super-2 number, since 2×1003623² = 2014518252258, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003621) 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 in 3 ways as a sum of consecutive naturals, for example, 167268 + ... + 167273.

It is an arithmetic number, because the mean of its divisors is an integer number (334542).

2^1003623 is an apocalyptic number.

1003623 is a deficient number, since it is larger than the sum of its proper divisors (334545).

1003623 is an equidigital number, since it uses as much as digits as its factorization.

1003623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334544.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1003623 is about 1001.8098621994. The cubic root of 1003623 is about 100.1206211136.

Adding to 1003623 its reverse (3263001), we get a palindrome (4266624).

The spelling of 1003623 in words is "one million, three thousand, six hundred twenty-three".