1403623 has 4 divisors (see below), whose sum is σ = 1511608. Its totient is φ = 1295640.

The previous prime is 1403617. The next prime is 1403627. The reversal of 1403623 is 3263041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1403623 is a prime.

It is a super-2 number, since 2×1403623² = 3940315052258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1403623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403627) 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, 53973 + ... + 53998.

It is an arithmetic number, because the mean of its divisors is an integer number (377902).

2^1403623 is an apocalyptic number.

1403623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1403623 is a deficient number, since it is larger than the sum of its proper divisors (107985).

1403623 is a wasteful number, since it uses less digits than its factorization.

1403623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107984.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1403623 is about 1184.7459643316. The cubic root of 1403623 is about 111.9653113236.

Adding to 1403623 its reverse (3263041), we get a palindrome (4666664).

The spelling of 1403623 in words is "one million, four hundred three thousand, six hundred twenty-three".