1023623 has 4 divisors (see below), whose sum is σ = 1026240. Its totient is φ = 1021008.

The previous prime is 1023601. The next prime is 1023643. The reversal of 1023623 is 3263201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3263201 = 17 ⋅191953.

It is a cyclic number.

It is not a de Polignac number, because 1023623 - 2⁸ = 1023367 is a prime.

It is a super-3 number, since 3×1023623³ = 3217668963332116101, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023643) 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, 590 + ... + 1547.

It is an arithmetic number, because the mean of its divisors is an integer number (256560).

2^1023623 is an apocalyptic number.

1023623 is a deficient number, since it is larger than the sum of its proper divisors (2617).

1023623 is an equidigital number, since it uses as much as digits as its factorization.

1023623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1023623 is about 1011.7425561871. The cubic root of 1023623 is about 100.7813129359.

Adding to 1023623 its reverse (3263201), we get a palindrome (4286824).

The spelling of 1023623 in words is "one million, twenty-three thousand, six hundred twenty-three".